Sulky has a couple of products that you quilt thru and it washes away after. Sulky Solvy I have used. It is clear, but doesn't cling like the press & seal. I've used the Sulky Solvy several times and like it.
I just bought Sulky Fabric Solvy, which is on the same idea, but is supposed to be clingy like the press & seal, is opaque and comes on sheets you run thru the printer. It also washes away after. I haven't tried it yet. I am hoping it doesn't gum up the needle. It was a bit pricey, so I may only use it for special situations.
Golden Threads is a cheaper alternative to the Sulky products. I like it and use it sometimes. It's great if you have many blocks to duplicate. You draw the design on one, stack the papers up and "sew" without thread to mark the other pages. Then you pin them to the blocks and follow the dotted line.