[{"data":1,"prerenderedAt":874},["ShallowReactive",2],{"project-29878971":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":28,"sentiment":29,"stance_mix":30,"scored_comments":35,"aspects":36,"strip":49,"post_text":51,"what":52,"said":82,"maker_in_thread":185,"shape":196,"grid":200,"attempts":835,"same_week":836,"maker_shows":40,"maker_hidden":866,"reader_version":867,"card":868},"29878971","Armbrust mask testing","I bought and tested the filtration of every mask on Amazon","title","Show HN: I bought and tested the filtration of every mask on Amazon","https:\u002F\u002Fwww.armbrustusa.com\u002Fpages\u002Fmask-testing","armbrustusa.com","lloydarmbrust",1641838420,2022,594,237,35,2570,2,"legend","security_privacy","protective equipment testing","web_app",[24,25,26,27],"n95 filtration test","kn95 mask","mask testing","respirator fit","curious",0.021,{"positive":31,"neutral":32,"mixed":33,"critical":34},28,66,4,29,127,{"performance":37,"design":39,"execution":42,"docs":45,"idea":46,"pricing":48},{"positive":18,"critical":38},6,{"positive":40,"critical":41},1,10,{"positive":43,"critical":44},3,8,{"positive":33,"critical":33},{"positive":40,"critical":47},0,{"positive":47,"critical":47},[43,40,33,40,50,43,50,40,40,40,18,33,33,33,43,43,50,40,40,50,47,47,33,18,50,43,47,33,43,43,33,33,18,33,43,40,33,18,33,50],5,null,{"problem":53,"audience":60,"pricing":51,"motivation":64,"time_to_build":71,"stack":78,"openness":79,"stage":80,"team_size":81},{"value":54,"source":55,"evidence":56},"Shoppers can't tell which Amazon masks actually filter particles","maker",[57],{"id":58,"by":11,"text":59},"29884295","I've spent about 1,000 hours on this with my team using a very expensive (~$250k) lab and I'd love for this to be a great resource for people when choosing a mask. The heavy lift…",{"value":61,"source":55,"evidence":62},"people choosing a mask to buy",[63],{"id":58,"by":11,"text":59},{"value":65,"source":55,"evidence":66},"Wanted a good resource for choosing masks; maker is a mask manufacturer",[67,68],{"id":58,"by":11,"text":59},{"id":69,"by":11,"text":70},"29888402","Haha thanks.. this one got out of hand. People kept asking me if x or y mask was \"good\" and I was just really curious... one day I looked up and had tested more masks than the…",{"value":72,"source":55,"evidence":73},"About 1,000 hours of testing over two years",[74,75],{"id":58,"by":11,"text":59},{"id":76,"by":11,"text":77},"29894045","This data set took me 2 years to compile but just recently seemed complete enough to post.",[],"unknown","launched","team",{"praise":83,"objections":100,"requests":129,"questions":151,"alternatives":163},[84],{"value":85,"source":86,"evidence":87},"Comprehensive, impressive testing data","commenter",[88,92,96],{"id":89,"by":90,"text":91},"29884557","nkurz","Wow, this is fabulous! They spent almost $5000 to buy and test every mask available on Amazon. If you click on a mask it will take you to a page with the test details. More…",{"id":93,"by":94,"text":95},"29890126","MailNerd","Thanks for this comprehensive test! Here's a (translated) test from half a year ago of the German \"Stiftung Warentest\" (similar to the US \"Consumer Reports\")…",{"id":97,"by":98,"text":99},"29891970","BTCOG","Lloyd, I very much appreciate all your work and efforts put into this testing! I stocked up on the Powecom masks very early after seeing all their thorough testing and backing…",[101,108,118],{"value":102,"source":86,"evidence":103},"Methodology page unclear on pass\u002Ffail criteria and construction\u002Fsmell",[104],{"id":105,"by":106,"text":107},"29882192","dwohnitmok","Small note on the methodology link: I thought it was a 404 dead link because when I opened it in a new tab it was a 404 (turns out it's a pop-up modal). I don't think what's…",{"value":109,"source":86,"evidence":110},"Filtration tested on material only, ignoring fit and side leakage",[111,115],{"id":112,"by":113,"text":114},"29888194","BugsJustFindMe","The page claims over 99% filtration by some dinky earloop surgical masks, which seems impossible unless they are only measuring the fabric and not the mask as a whole. It…",{"id":116,"by":11,"text":117},"29888381","Not exactly.. it really depends on the situation. For example an ASTM 2 or 3 surgical mask fabric has a filtration of 98%+ On my face I have a leakage of about 21% or PFE of 79%…",{"value":119,"source":86,"evidence":120},"Mobile layout and table had bugs",[121,125],{"id":122,"by":123,"text":124},"29887574","kps","I'm not seeing anything but a list of mask names with no other information. Has the site fallen over? (Chrome 96 on MacOS 11.6)",{"id":126,"by":127,"text":128},"29891060","MrDresden","This is great, and thank you for going out of your way to do this. There seems to be some minor issue (I think) with the table you present on the page. I just watched the test…",[130,140],{"value":131,"source":86,"evidence":132},"Add scatter plot of resistance vs filtration",[133,137],{"id":134,"by":135,"text":136},"29882134","jmpman","Anyone have a scatter plot of resistance vs filter efficiency? Watching each review would take forever. I want to explore the results visually.",{"id":138,"by":11,"text":139},"29884433","This is a good idea... we can put this together for you.",{"value":141,"source":86,"evidence":142},"Show worst filtering masks and affiliate links",[143,147],{"id":144,"by":145,"text":146},"29890444","hhsbdbdbdbdb","Can you also list the worst filtering masks? Or the masks that let air through with the least resistance?",{"id":148,"by":149,"text":150},"29882126","hedora","Consider adding (affiliate) links to ones that did well, ordered by availability or price. Why Amazon doesn’t do this is beyond me.",[152],{"value":153,"source":86,"evidence":154},"Why is a KN95 with 99.87% filtration marked fail",[155,159],{"id":156,"by":157,"text":158},"29882173","sschueller","I'm a bit confused by the listed results. For example one mask is listed a KN95 and has a fail although filtering is stated as 99.87%. Isn't a KN95 specifically rated to hold at…",{"id":160,"by":161,"text":162},"29887503","Tagbert","@lloydarmbrust , I’m curious about the fail rating for masks where Standard = KN95 is fail? Specifically for masks that claim to be KN95 and filtration values are high. How do…",[164,171,178],{"value":165,"source":86,"evidence":166},"Project N95 clearinghouse",[167],{"id":168,"by":169,"text":170},"29887515","another_comment","Project N95 is the National Critical Equipment Clearinghouse for personal protective equipment (PPE), COVID-19 diagnostic tests and critical equipment. Edit: stupid typo on url,…",{"value":172,"source":86,"evidence":173},"NIOSH respirator test data",[174],{"id":175,"by":176,"text":177},"29897112","jerlam","For another set of data, NIOSH, the official US government agency tasked with certifying respirators and other PPE, has tested and released a large set of data, including masks…",{"value":179,"source":86,"evidence":180},"Aaron Collins mask test spreadsheet",[181],{"id":182,"by":183,"text":184},"29886753","donavanm","Related, for those who havent seen, is Aaron Collins collection of mask test data https:\u002F\u002Fdocs.google.com\u002Fspreadsheets\u002Fd\u002F1M0mdNLpTWEGcluK6hh5LjjcFixwmOG853Ff45d3O-L0",{"comments":186,"answered":187,"key":188},49,20,[189,190,193],{"id":58,"text":59},{"id":191,"text":192},"29888217","Testing masks is very specialized and all in I've spent about $250k on the mask lab. I just bought a new machine that costs about $90k. Here's an overview of the machine:…",{"id":194,"text":195},"29888248","Ahhh... good point. The search will work but you are correct that the full version is better on desktop.",{"commenters":197,"max_depth":44,"maker_replies":186,"first_comment_mins":198,"lifespan_hours":199},128,38,94,[201,203,207,211,215,216,218,222,225,228,229,232,235,237,241,244,247,249,253,255,257,258,260,262,265,267,271,274,277,279,281,283,286,289,291,293,295,297,299,303,306,309,312,314,317,320,323,325,327,330,332,335,338,341,343,347,350,352,354,358,361,364,367,369,371,374,377,380,383,386,389,392,395,397,400,404,407,409,412,414,417,419,422,425,428,431,434,437,440,442,444,448,451,453,457,458,460,462,465,468,472,475,477,478,480,482,484,486,488,491,494,495,498,500,502,504,507,510,512,515,517,520,522,524,527,530,532,534,536,539,542,545,547,550,552,555,556,558,561,563,566,569,572,574,578,580,583,586,589,592,593,595,598,601,603,604,606,608,610,612,614,616,618,622,624,628,631,633,635,637,641,645,650,652,655,657,660,662,665,669,672,676,680,683,685,687,689,694,697,701,704,706,708,711,713,715,717,721,724,727,730,732,735,737,739,743,746,748,752,754,758,760,762,765,768,771,773,776,778,780,782,786,788,790,792,796,801,803,807,811,815,818,821,825,826,828,832],[58,47,47,202,11,40],"project\u002Fneutral\u002Fexecution",[204,47,43,205,206,47],"29884863","project\u002Fneutral\u002Fperformance","taf2",[208,47,47,209,210,47],"29889553","commenter\u002Fneutral\u002Fnone","Double_a_92",[212,47,43,213,214,47],"29887718","project\u002Fneutral\u002Fdesign","throwaway81523",[191,47,47,202,11,40],[217,47,43,202,214,47],"29888860",[219,47,40,220,221,47],"29889531","project\u002Fcritical\u002Fdesign","nyanpasu64",[223,47,40,220,224,47],"29887738","yborg",[226,47,40,220,227,47],"29887916","nopenopenopeno",[194,47,47,213,11,40],[230,47,40,220,231,47],"29889192","bfung",[233,47,40,220,234,47],"29890970","dzdt",[236,47,47,213,11,40],"29891975",[238,47,50,239,240,47],"29887932","project\u002Fpositive\u002Fnone","nobodytoseehere",[242,47,47,243,11,40],"29888235","project\u002Fneutral\u002Fnone",[245,47,50,246,240,47],"29888280","maker\u002Fpositive\u002Fnone",[248,47,47,202,11,40],"29888358",[250,47,40,251,252,47],"29888015","project\u002Fcritical\u002Fperformance","wrycoder",[254,47,47,205,11,40],"29888201",[256,47,40,251,113,47],"29888252",[116,47,47,205,11,40],[259,47,43,205,252,47],"29888428",[261,47,47,205,11,40],"29891956",[263,47,43,205,264,47],"29888728","creato",[266,47,47,205,11,40],"29892032",[268,47,50,269,270,47],"29889260","project\u002Fpositive\u002Fdocs","divbzero",[272,47,47,273,11,40],"29892475","project\u002Fneutral\u002Fdocs",[275,47,50,269,276,47],"29893609","bagacrap",[278,47,43,273,252,47],"29888445",[280,47,47,205,11,40],"29892057",[282,47,47,273,11,40],"29892493",[284,47,43,205,285,47],"29895493","Scoundreller",[287,47,43,273,288,47],"29888927","3np",[290,47,47,273,11,40],"29892071",[292,47,47,273,11,40],"29892488",[294,47,50,269,288,47],"29892869",[296,47,47,246,11,40],"29893357",[298,47,50,269,252,47],"29896081",[300,47,47,301,302,47],"29889942","other\u002Fneutral\u002Fnone","bjarneh",[304,47,47,301,305,47],"29892782","TrueGeek",[307,47,47,308,11,40],"29893512","maker\u002Fneutral\u002Fnone",[310,47,43,213,311,47],"29890124","pcl",[313,47,43,205,240,47],"29888321",[315,47,40,251,316,47],"29901449","didntknowya",[318,47,40,220,319,47],"29888132","causi",[321,47,40,251,322,47],"29888157","jader201",[324,47,47,301,319,47],"29888239",[326,47,47,213,11,40],"29888243",[328,47,40,220,329,47],"29888145","newman314",[331,47,47,213,11,40],"29888206",[333,47,40,334,329,47],"29888257","project\u002Fcritical\u002Fexecution",[336,47,40,220,337,47],"29889543","twelvechairs",[339,47,40,220,340,47],"29893428","pimlottc",[342,47,47,213,11,40],"29893626",[344,47,43,345,346,47],"29888621","project\u002Fmixed\u002Fdesign","nier",[348,47,47,209,349,47],"29890371","carlmr",[351,47,47,301,11,40],"29893594",[353,47,47,301,346,47],"29897372",[355,47,40,356,357,47],"29888790","project\u002Fcritical\u002Fdocs","tallanvor",[359,47,43,273,360,47],"29888873","waynesonfire",[362,47,40,334,363,47],"29891056","vertis",[365,47,47,366,11,40],"29891996","maker\u002Fneutral\u002Fdocs",[368,47,50,246,363,47],"29892249",[370,47,43,202,340,47],"29893247",[372,47,40,220,373,47],"29889471","usrusr",[375,47,47,376,11,40],"29891964","maker\u002Fneutral\u002Fdesign",[378,47,43,379,373,47],"29895388","project\u002Fmixed\u002Fperformance",[381,47,50,239,382,47],"29888901","potatochup",[384,47,47,209,385,47],"29889324","TylerE",[387,47,43,243,388,47],"29888986","throwaway4good",[390,47,43,243,391,47],"29889497","mmahemoff",[393,47,43,243,394,47],"29889711","ricardobeat",[396,47,47,209,391,47],"29889821",[398,47,43,273,399,47],"29889622","OJFord",[401,47,50,402,403,47],"29889656","project\u002Fpositive\u002Fperformance","nobrains",[405,47,43,273,406,47],"29889683","pmuk",[408,47,43,273,90,47],"29890866",[410,47,43,213,411,47],"29889929","formerly_proven",[413,47,47,308,11,40],"29893696",[415,47,50,239,416,47],"29889963","watersb",[418,47,47,308,11,40],"29893916",[420,47,43,243,421,47],"29890029","okl",[423,47,43,213,424,47],"29890350","_n_b_",[426,47,43,213,427,47],"29890399","weinzierl",[429,47,43,213,430,47],"29890960","jve",[432,47,43,243,433,47],"29891046","roeles",[435,47,43,213,436,47],"29896221","yrral",[438,47,43,243,439,47],"29901050","bradknowles",[441,47,43,243,439,47],"29901217",[443,47,43,213,439,47],"29902942",[445,47,40,446,447,47],"29903118","maker\u002Fcritical\u002Fnone","SixDouble5321",[449,47,40,334,450,47],"29906245","astura",[89,40,50,452,90,47],"project\u002Fpositive\u002Fexecution",[454,40,50,455,456,47],"29888125","project\u002Fpositive\u002Fidea","pjgalbraith",[69,40,47,308,11,40],[459,40,50,246,98,47],"29892025",[168,18,47,461,169,47],"other\u002Fpositive\u002Fnone",[463,18,47,301,464,47],"29887569","cozzyd",[466,18,47,467,169,47],"29887610","other\u002Fneutral\u002Fdocs",[469,18,47,470,471,47],"29888053","other\u002Fcritical\u002Fexecution","mjevans",[473,18,47,209,474,47],"29895375","fknorangesite",[476,18,47,470,471,47],"29900431",[105,43,40,356,106,47],[479,43,47,366,11,40],"29884376",[481,43,40,334,340,47],"29887980",[483,43,47,308,11,40],"29888433",[485,43,40,356,340,47],"29892859",[487,43,47,209,176,47],"29896893",[489,43,47,209,490,47],"29936738","dmwallin",[492,43,47,209,493,47],"29889021","sokoloff",[182,33,47,301,183,47],[496,33,47,301,497,47],"29887528","fouc",[499,33,50,402,145,47],"29890458",[501,33,43,205,176,47],"29895203",[503,33,47,209,183,47],"29901027",[505,50,47,301,506,47],"29887829","halpert",[508,50,47,301,509,47],"29887866","fnord77",[511,50,47,301,506,47],"29887966",[513,50,47,301,514,47],"29888039","cpeterso",[516,50,47,301,506,47],"29888123",[518,50,47,209,519,47],"29888885","Qub3d",[521,50,47,209,506,47],"29892292",[523,50,47,209,519,47],"29894201",[525,50,47,209,526,47],"29888146","thro1",[528,50,47,209,529,47],"29888234","dpark",[531,50,47,209,526,47],"29888443",[533,50,47,301,214,47],"29888597",[535,50,47,209,264,47],"29888852",[537,50,47,301,538,47],"29888747","qbasic_forever",[540,50,47,209,541,47],"29889760","beebmam",[543,50,47,209,544,47],"29890164","blip54321",[546,50,43,213,329,47],"29888170",[548,50,47,301,549,47],"29888716","renewiltord",[551,50,43,213,538,47],"29888726",[553,50,47,554,11,40],"29888269","maker\u002Fneutral\u002Fexecution",[93,38,50,452,94,47],[156,557,43,202,157,47],7,[559,557,40,356,560,47],"29882220","buescher",[562,557,47,366,11,40],"29884427",[564,557,43,273,565,47],"29889979","curling_grad",[567,44,43,202,568,47],"29889532","anotheryou",[570,44,43,202,571,47],"29893642","GavinMcG",[573,44,50,246,568,47],"29896599",[575,576,43,243,577,47],"29883595",9,"david_allison",[579,576,47,308,11,40],"29884395",[581,576,47,301,582,47],"29884424","genericone",[584,576,47,301,585,47],"29889691","dzhiurgis",[587,576,47,301,588,47],"29886340","jpindar",[590,576,47,301,591,47],"29890997","dboreham",[160,41,43,554,161,47],[594,41,47,202,11,40],"29888283",[596,41,43,273,597,47],"29889765","theogravity",[599,41,43,202,600,47],"29892176","DangitBobby",[134,602,43,243,135,47],11,[138,602,47,308,11,40],[605,602,47,209,135,47],"29887935",[607,602,47,301,11,40],"29888304",[609,602,47,301,135,47],"29891830",[611,602,47,301,11,40],"29893967",[112,613,40,334,113,47],12,[615,613,50,452,571,47],"29888245",[617,613,47,554,11,40],"29888260",[619,620,43,243,621,47],"29888754",13,"londons_explore",[97,623,50,246,98,47],14,[625,626,47,301,627,47],"29888262",15,"dylan604",[629,626,47,209,630,47],"29888290","boardwaalk",[632,626,47,209,627,47],"29888367",[634,626,47,209,493,47],"29889031",[175,636,47,301,176,47],16,[638,639,43,243,640,47],"29914271",17,"beezle",[642,643,43,345,644,47],"29887749",18,"83457",[646,647,47,648,649,47],"29888536",19,"other\u002Fpositive\u002Fdesign","bee_rider",[651,647,47,461,11,40],"29893981",[653,187,43,243,654,47],"29885700","_xerces_",[656,187,47,308,11,40],"29888299",[658,187,43,243,659,47],"29888376","nwatson",[126,661,43,273,127,47],21,[663,661,47,664,90,47],"29892270","commenter\u002Fneutral\u002Fdocs",[666,667,50,668,509,47],"29887843",22,"project\u002Fpositive\u002Fdesign",[670,667,47,301,671,47],"29895710","nikolay",[673,674,43,308,675,47],"29894850",23,"notreallyserio",[677,678,43,243,679,47],"29887891",24,"koyote",[681,678,47,209,682,47],"29887983","veemjeem",[684,678,47,209,385,47],"29889364",[686,678,47,205,11,40],"29888293",[688,678,43,273,340,47],"29893551",[690,691,43,692,693,47],"29890995",25,"project\u002Fmixed\u002Fexecution","edoceo",[695,696,43,243,568,47],"29896772",26,[698,699,50,239,700,47],"29895153",27,"nobodyandproud",[702,31,43,243,703,47],"29889490","viraptor",[705,31,43,205,394,47],"29889747",[707,31,43,202,703,47],"29889866",[709,34,43,202,710,47],"29888761","fblp",[122,712,40,334,123,47],30,[714,712,47,554,11,40],"29894006",[716,712,43,202,123,47],"29925387",[718,719,50,239,720,47],"29887699",31,"sytelus",[148,722,43,723,149,47],32,"project\u002Fneutral\u002Fpricing",[725,722,47,726,11,40],"29884441","maker\u002Fneutral\u002Fpricing",[728,722,47,729,183,47],"29886836","commenter\u002Fneutral\u002Fpricing",[731,722,43,723,161,47],"29887425",[733,722,47,734,11,40],"29888308","project\u002Fpositive\u002Fpricing",[736,722,50,246,149,47],"29888757",[144,738,43,205,145,47],33,[740,741,40,251,742,47],"29889185",34,"RobertRoberts",[744,16,43,273,745,47],"29882096","bryguy32403",[747,16,47,202,11,40],"29888322",[749,750,43,243,751,47],"29886358",36,"71a54xd",[753,750,47,209,161,47],"29887438",[755,756,40,251,757,47],"29887607",37,"jcun4128",[759,756,47,209,11,40],"29888437",[761,756,47,301,757,47],"29888584",[763,756,47,301,764,47],"29889903","nabla9",[766,198,43,243,767,47],"29887970","autarch",[769,198,50,239,770,47],"29888101","kevin_thibedeau",[772,198,47,668,11,40],"29888317",[774,198,40,334,775,47],"29888193","jcims",[777,198,47,554,11,40],"29888315",[779,198,50,246,775,47],"29889166",[781,198,47,308,11,40],"29894018",[783,198,47,784,785,47],"29895563","commenter\u002Fneutral\u002Fdesign","RobotCaleb",[787,198,40,334,214,47],"29888618",[789,198,43,202,775,47],"29889180",[791,198,43,202,214,47],"29889977",[793,794,43,202,795,47],"29888143",39,"asterizer",[797,798,47,799,800,47],"29884113",40,"other\u002Fneutral\u002Fidea","exabrial",[802,798,47,308,11,40],"29884230",[804,805,47,301,806,47],"29889443",41,"stefan_",[808,809,50,239,810,47],"29879643",42,"jaquia",[812,813,43,213,814,47],"29891057",43,"271828182846",[816,813,43,213,817,47],"29903042","sandos",[819,820,50,239,671,47],"29885563",44,[822,823,50,239,824,47],"29888685",45,"forgotmyoldacc",[76,823,47,308,11,40],[827,823,50,246,824,47],"29896658",[829,830,47,301,831,47],"29887652",46,"NoblePublius",[833,830,43,243,834,47],"29887881","cavisne",[],[837,842,847,852,857,862],{"id":838,"name":839,"points":840,"category":841},"29851834","BookStack",562,"productivity",{"id":843,"name":844,"points":845,"category":846},"29862588","Movie of the Night (Streaming Availability API)",364,"data",{"id":848,"name":849,"points":850,"category":851},"29836852","Quickz",304,"learning_science",{"id":853,"name":854,"points":855,"category":856},"29838197","Minimator",220,"creative",{"id":858,"name":859,"points":860,"category":861},"29864418","Evil Wordle",177,"games",{"id":863,"name":864,"points":865,"category":851},"29867058","Keyboard Drill",157,false,"v2",{"id":869,"name":5,"line":6,"ai":866,"cat":20,"year":13,"points":14,"comments":15,"rec":28,"s":870,"top":18,"kw":871,"maker":11,"domain":10,"tier":19,"attempts":47,"strip":872,"url":9,"mix":873,"praise":85,"objection":102,"sub":21},29878971,0.02,[24,25,26,27],"3141535111244433511500425304334424314245",[31,32,33,34],1794036615565]