I have the tissue sensitize and a 4x5 negative. Can someone tell me if the black part of the tissue is supposed to touch the emulsion side of the neg? How do I make this sandwich and how do I put the sandwich on a UV light? My rational tells me tissue down black part facing up, and negative emulsion down on top of the tissue and from there to the UV light in that position, like on Pt/Pl? Thanks if someone can send some direction my way. Jaime.