What should be the distance between glass and the bulb and is it okay to have exposing unit of wood?

Hello, i am using 200 wt bulb for my exposing unit.The distance between glass and bulb is approx 12 inches .what time would it take to burn a screen and does it depends on the type of stuff we are printing? Like if printing alphabets(normal font) ,is it going to take less time than alphabets with bo...

what mesh size should i use for 2nd image(lower one).

http://cdn.shopify.com/s/files/1/0373/5929/products/aghori-t-shirt-design_1024x1024.jpg?v=1439300198 http://cdn.shopify.com/s/files/1/0373/5929/products/OM_HARI_DDESIGN_large.jpg?v=1425978577 hello , i am looking up for the mesh size and ink used for these kind of images.since i am new to screen pr...