81 - Ultimate Sharpening Station, страница 42
Shop breathe right for Safe Finishing Finishing a project safely is just as important as operating your tools safely Air Outflow Valve T Respirators. Choose one for fit and comfort. The three different styles shown offer similar protection (see photos above and below). Face Piece The work you do in the shop puts a number of different things into the the air. And some of these materials can pose health risks if you don't properly protect yourself. I use respiratory masks for two types of hea 1th hazards — dust and harmful vapors. And a different mask design is needed to guard against each these hazards. Types of Protection. Dust and sawdust floating in the air require the most basic type of filter. It's nothing more than a thin cloth-like material. And it works like putting a handkerchief over your nose and mouth on a dusty day. But when chemicals are present, you need something different. That's because chemicals often exist in the form of mists or vapors. And depending on the finishing material Face Piece or solvent being used, the risks can range from minimal to serious. So this is where you'll need to use a good respirator mask. TWO-STAGE PROTECTION ShopNotes No. 81 Most respirators, like those shown in the photos at left, provide two stages of protection. The first stage consists of a pre-fdter that captures larger particles, like pigments and dust. It prevents them from clogging up the filter used in the next stage. The second stage of protection is a small cartridge like you see in the illustration at the top of the next page. It's filled with small pieces of activated charcoal. Activated Charcoal. This material is simply burned wood (carbon) that's been treated with a high concentration of oxygen. Treating it |
