{"id":39075,"date":"2019-05-22T08:00:11","date_gmt":"2019-05-21T23:00:11","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=39075"},"modified":"2026-05-17T13:53:07","modified_gmt":"2026-05-17T04:53:07","slug":"dust-mask-information","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/dust-mask-knowledge\/","title":{"rendered":"Let's Learn About Dust Masks | Respiratory Protection in the Construction Industry"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

Do you wear a dust mask?<\/p>\n

We buy this a lot at our house.<\/p>\n

\"3M<\/p>\n

3M Dust Mask 8805 DS2<\/p>\n

That's the product, isn't it?<\/p>\n

Every year, our company buys a huge amount from 3M at the Welding Festival held yesterday. (Apparently, it\u2019s enough to make a profit reselling it\u2014though we don\u2019t actually resell it.)<\/p>\n

 <\/p>\n

The box says \"DS2\" on it.<\/p>\n

Actually, this isn't a manufacturer's model number or anything like that,Dust Resistance<\/span><\/strong><\/span>It's that symbol.<\/p>\n

\n

Classification of Dust Masks by Type of Work<\/strong><\/h3>\n\n\n\n\n\n
\u30fbWork or emergency operations within areas where there is a risk of contamination, such as due to a radioactive material spill
\n\u30fbWork involving potential exposure to dioxins
\n\u30fbOther tasks similar to those listed above<\/td>\n		RS3 RL3<\/span>
\n*If oil mist or similar substances are present, select \"L.\"<\/span><\/td>\n<\/tr>\n
\u30fbWork in areas where metal fumes are emitted (including welding fumes)
\n\u30fbControl concentration: 0.1 mg\/m3<\/sup>(\u203b1) Work performed in areas where dust or other particles from the following substances are emitted
\n\u30fbOther tasks similar to those listed above
\n*1: Cadmium, chromic acid, dichromic acid, beryllium, lead, and their compounds<\/td>\n		DS2 DL2 RS2 RL2<\/span>
\nand has a particle capture efficiency of that level or higher
\nDS3, DL3, RS3, RL3
\n*If oil mist or similar substances are present, select \"L.\"<\/span><\/td>\n<\/tr>\n
\u30fbGeneral dust-generating work other than those listed above<\/td>\nDS1 DL1 RS1 RL1<\/span>
\nand has a particle capture efficiency of that level or higher
\nDS2 DL2 RS2 RL2 DL3 DS3 RS3 RL3
\n*If oil mist or similar substances are present, select \"L.\"<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n<\/div>\n

Classification of 12 Types of Dust Masks (DS1\u2013RL3)<\/h3>\n\n\n\n\n\n\n\n\n\n\n
Disposable \/ Replaceable<\/th>\nTest Particles and Collection Efficiency<\/th>\n<\/tr>\n
S<\/span>
\nSolid test particles
\nMeasurements were performed using sodium chloride (NaCl)<\/th>\n		L<\/span>
\nLiquid on the test particle
\nMeasured using di-n-octyl phthalate (DOP)<\/th>\n		Category
\n1\/2\/3<\/span>
\n(Particle Collection Efficiency)<\/th>\n<\/tr>\n
D<\/span>
\nDisposable Dust Mask<\/th>\n		DS3<\/td>\nDL3<\/td>\nCategory 3: 99.9% or higher<\/td>\n<\/tr>\n
DS2<\/td>\nDL2<\/td>\nCategory 2: 95.0% or higher<\/td>\n<\/tr>\n
DS1<\/td>\nDL1<\/td>\nCategory 1: 80.0% or higher<\/td>\n<\/tr>\n
R<\/span>
\nReplaceable Dust Mask<\/th>\n		RS3<\/td>\nRL3<\/td>\nCategory 3: 99.9% or higher<\/td>\n<\/tr>\n
RS2<\/td>\nRL2<\/td>\nCategory 2: 95.0% or higher<\/td>\n<\/tr>\n
RS1<\/td>\nRL1<\/td>\nCategory 1: 80.0% or higher<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

When it comes to cement dust, I suppose...Problems with Using DS2<\/span><\/strong><\/span>I don't think so.<\/p>\n

I apologize for the vague wording\u2014\"I think\"\u2014but there isn't a specific classification for cement and the like.<\/p>\n

I checked by grain size and other criteria, but nothing came up.<\/p>\n

Since metal fumes (smoke from welding) are also classified as DS2, they are finer than cement dust.<\/p>\n

The opinion is that, since asbestos is acceptable under DS2, it is likely the case.<\/p>\n

This is an absolute must-have, so please use it if you\u2019re working with cement-based products like Plantman or when drilling in environments with heavy dust.<\/p>\n

\"3M<\/p>\n

It is reported that the incidence of cancer among U.S. citizens\u2014particularly firefighters and police officers\u2014has risen due to the dust (and other airborne particles) released when the buildings collapsed during the previous terrorist attacks in the United States.<\/p>\n

When you think about it, it\u2019s probably a good idea to wear a dust mask, isn\u2019t it?<\/p>\n

These days, one in every two people will develop cancer.<\/p>\n

To prevent that from happening due to work and to ensure you can work with energy, we provide dust masks here!<\/p>\n

It's the company's responsibility to protect its employees' health, isn't it!?<\/p>\n

A company is made up of people!<\/span><\/strong><\/span><\/p>\n

\"3M<\/p>\n

There is a wide variety of types, and the unit prices vary.<\/p>\n

If you search for \"DS2 dust mask,\" you'll find them starting at 60 yen per mask.<\/p>\n

Please consider this at your company.<\/p>\n

You can't buy good health with money. But you can buy as many masks as you want.<\/p>\n

Regret doesn't do any good, you know?<\/span><\/strong><\/span><\/p>\n

 <\/p>\n

See you later.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. Do you use dust masks? We often buy this one at our place. It\u2019s the 3M 8805 DS2 dust mask. Every year, we buy a huge quantity of them from 3M at the welding festival held yesterday. (Apparently, it\u2019s enough to make a profit reselling them\u2026<\/p>","protected":false},"author":2,"featured_media":39083,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[111],"tags":[2397,2398,2399,2400,2401],"class_list":["post-39075","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-safety","tag-2397","tag-ds2","tag-2399","tag-2400","tag-2401"],"acf":[],"yoast_head":"\n\u9632\u5875\u30de\u30b9\u30af\u3092\u77e5\u3063\u3066\u307f\u3088\u3046\uff5c\u5efa\u8a2d\u696d\u306e\u547c\u5438\u5668\u4fdd\u8b77 - 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