We actually suggest pressing JPSS between 175 and 190 C, for 20-30 seconds. If you see yellowing of the image, it could possibly be due to scorching. I would suggest lowering the temperature or the time to see if that helps.
How did it go?I'm using pigment from Fotorite. The images seemed fine before pressing, either that or i didn't notice. So think it could indeed be some slight scorching. I'll try again tomorrow with reduced temp/time and see how that works out.
Thanks for the tips!