Re: Tween 20, mottling and grain

Richard Sullivan (richsul@roadrunner.com)
Thu, 20 Feb 1997 11:18:32 -0700

<x-rich>Terry Says:

>After a lot of experiment I found that adding wetting agents to the

>solution led to uneven coating.

This was experience also until I tried the Tween 20. Have you actually tried Tween 20 in a high concentration? I notice that Mike Ware on his Web Page now recommends a 2% dilution. I could have sworn that he was in some earlier writings recommending 50%. I'm using a 50%, and 1 drop to an 8x10 is at the danger threshhold of breaking the size. But then maybe the high powered concentration is doing things different from the recommended 2%.

If I erred in this maybe I stumbled on to something, or equally as likely, there are what I call "personal variables" at work. Much of "this works for me" are the subtle and not so subtle differences that enter in to each worker's processing system such as local humidity, coating technique, etc etc. I even believe that static electricity is one that has not been recognized. Remember your science teachers trick of rubbing a rubber balloon in her hair and holding it next to a thin stream of water coming from a faucet. The balloon will push the stream out away from it in a slight arc. If the paper has a charge, will it not push the water up and away from it? Mark it up as another of my possibly nutty theories, but I'd like to hear on this from anyone with a more grounded scientific knowledge of electro physics.

>I am sorry if this sounded insufferably smug.....

Just insufferable.

Dick Sullivan

<center>Bostick & Sullivan

PO Box 16639, Santa Fe

NM 87506

505-474-0890 FAX 505-474-2857</center>

</x-rich>