 Neglected Yellow Mesh Screens
hi
I inherited my screen room 3 weeks ago and have come across a problem that I would like to fix regarding the yellow screens in my stock.
The guy who handed the room over to me showed me a stack of yellow screens and said they were trying to eliminate them as they are (in his opinion) hit and miss.
I have come across this attitude towards yellow screens in a shop that I worked at before, where printers were slicing the yellow mesh out of the frames and putting the frames into the re-meshing pile, urging the boss to have them re-stretched with white mesh...
Now, I have burnt beautiful high detailed half tone art on yellow mesh screens over and over again and I am convinced that the printers are wrong about this.
Sure some fail. And when they fail, they fail pretty badly, but I want to use the yellow screens to do the detail work that some delicate art requires.
Here is my problem; many of the yellow screens in the pile are so neglected that they have blocks in them and or are full of blue drips that I just cant get rid of.
I have reclaimed some of the less affected ones with poly thinner and have added them to my inventory but many of them were un-fixable (with poly thinner and a set up on my light table, meaning: I probably need to take them to the sink.)
Any commentary on what I am presenting would be appreciated. What problems and successes have you had with yellow screens? Have you tried to eliminate them from your stock or have you had great success with them?
But my main question, finally, is this: How can I get rid of these blue emulsion streaks and the crust that is blocking the holes in the mesh?
I am including a couple of pics to show the problem. | 
