So ive been through three screens of step exposures trying to get a 45 lpi halftone using the following—
230 yellow mesh on a 30x40 frame
2 500 watt halogen utility lamps
veg oil bond postives
total image area of 18"x24"
distance from lamps to stencil is double the diagonal of the image area—so about 58"
Im wondering if I am fighting a losing battle trying to get this kind of LPI with halogens and oiled positives. the halftone is damaged by the washout proccess even with 25 min. burn times. whatch'yall think?