In message <[log in to unmask]> "Ben Lee" writes: > > We are currently testing and looking at a latex peelable, a water-soluble, > a UV peelable, and a UV water-soluble. You have covered most types - I would break them down a bit further: 1) oven thermal cure peelable - 1 or 2 part PVC (I think), the type screened on by your pcb supplier, who may also use it as a plating or HASL mask. 2) ambient air dry peelable - latex (high pH) or synthetic latex (neutral pH and probably preferable). Dispensed. 3) ambient air dry soluble - water (warm) or even solvent soluble types. Dispensed or screened/stencilled. 4) light cure peelable 5) light cure water soluble The light cures may come in long wave UV, or a combination of UV/ visible light cure which is often faster. Both can be dispensed or screened/stencilled. There was some discussion in this forum about 2-3 months ago about contamination left by peelable masks. Look thru the archive based on the IPC www page and search for messages from Karen Tellefusen (sp? sorry Karen!) and Doug Pauls. Peter -- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Peter Swanson Oxfordshire, England INTERTRONICS [log in to unmask] http://www.cygnetuk.demon.co.uk Suppliers of materials and consumables to the electronics & related industries ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************