sis.. ahmm problema kasi sa states yan ginawa.. ahmm but here in the Philippines gamit ko is Elmers glue and sensitizer.. mixed mo sya.. then regarding with photo flood bulb its used for making the paterns on the silk screen.. you can use sunlight as replacement for the bulb.. i cant really explain it.. diba if you have a patern na ginawa sa onion paper patong mo yan sa taas nang silk screen(with elmers glue mix na) then when lighted the diba yng patern will have a shadow... yng shadow part d sya ganon ka dry... we used spraygun to remove the shadowed part.. after that youll know have your silkscreen.. sory lisod explain ahaha..