OCR Text |
Show Paper for Dark Room. Modern photographic plates are so sensitive that often a screen of red glass In the dark room Is not suflielcnt to prevent fogging. A French photographic photo-graphic expert gives the following prescription pre-scription for iunking a paper screen, which Is GO per cent more effective-than effective-than red glass: Take unsized pffper and dip It thoroughly In 100 cubic centimeters of water containing sL grams of tnrtrazlne. Then pnss It over blotting paper and dry It. To. render the coloring ainlter more nd-herent, nd-herent, a little gum arable may be udd--od to the solution. j |