Mr.Smith,etal I am curious about a acylic water-based drying question that I was asked and had no sure answer for. Join in on this one and all! What I wonder about is, dryers? Are there any particular tricks or dryers such as those that work for oil based paints. The inquiry came to as to why does acyrilic gloss take so long to dry and what can be done to shorten the drying time. Lots of shops in our area are now going to acrylics because of the chemical issues here in California. I have used acrylics quite often on banners and some pvc and noticed myself that the pvc dryed slow but the banner was ready in hours. So, any tricks heads? Lay it on me. P.S. I have used flo-trol with not much luck. Thas'it.................CrazyJack
------------------ Jack Wills Studio Design Works 6255 Brookside Circle Rocklin, CA 95677 writer@quiknet.com
Posted by Kent Smith (Member # 251) on :
Flo-trol is a flow enhancer and retarder which will slow the dry time. Most waterbornes have a synthetic blended dryer, typically based in amonia but not always. These dryer compounds are tricky since the must be balanced for each batch of materials. That means that even a change from one color to another will dictate a different dryer blend and gloss finishes dry more slowly than matte. As far as I know, there is not a commercially available dryer available because of these variables. Most waterbornes should dry within 24 hours depending upon humidity. Temperature and air movement are the best accelerants. Time is the price you pay for this type of chemistry. Typically however, waterborne primers will dry within 30 minutes as they do not have to build a gloss finish and a texture to the finish is preferrable for intercoat adhesion. This is why I prefer to use solvent based enamels for lettering and topcoats. They are still exempt as graphic arts coatings, even in Calif. although you may have to prove that to an inspector, the law has not changed since 1983.
------------------ Kent Smith Smith Sign Studio Greeley, Colorado, USA kent@smithsignstudio.com
Posted by jack wills (Member # 521) on :
Hi Kent, Thanks for the reply. I was sure you would have some answer. Here's the deal...It's not so much the chemistry of oil base on a surface as it is within the neighborhood. The chemistry that is in question has become politics. Without the proper treatment equipment or area, it is almost prohibitive in some locations to have oil base fumes streaming from the shop. So water base has become a new venture for correctness. Once again, it is good to see that your keyboard still has the swing. Thanks Thas'it............................Jack P.S. Hello to the Family!
------------------ Jack Wills Studio Design Works 6255 Brookside Circle Rocklin, CA 95677 writer@quiknet.com
