Woodworker's Journal summer-2009, страница 22

Woodworker

QWhat types of cartridges and filters should I be using in my respirator? I use the typical solvents and finishes most woodshops use.

Jeff Damon Wasilla, Alaska

A An "organic vapor cartridge," which is called just that by manufacturers and vendors, will handle the common solvents you are likely to use, but to work well, it must be paired with a pre-filter to stop airborne finish particles and dust. Most companies offer three types of pre-filters, designated "P" for oil-proof, "R" for oil-resistant and "N" for not for oil. If you do not spray oil-based coatings, you

Which filters are best suited for the different solvents used most commonly by woodworkers? If you know how to read them, you'll find that the answers are printed right on the filters.

may be able to use the slightly cheaper "N" grade, but for wide-spectrum protection, your best bet is a "P"-type pre-filter atop an organic vapor cartridge.

Michael Dresdner

Q Whenever I assemble a mortise and tenon with glue, I always miss at least one spot in cleaning up. This, of course, shows up once the workpiece is stained. How important is it to apply glue to the mating surfaces of a tenon's shoulder?

Must the entire tenon be coated with glue? If I do not apply glue to the shoulders, would I be reducing the strength of the joint?

Robert Eaton Garden City, Michigan

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summer 2009 25