Chemask WF Water Filterable Solder Mask
Chemask WF Solder Masking Agent is a high-temperature temporary spot mask that protects component-free areas from molten solder during wave soldering. It is water soluble and designed to be removed with open and closed loop aqueous cleaning systems. Chemask WF is low foaming and has no effect on deionized water (DI) system resin beds. This water-soluble formulation is stable to rosin, organic, and inorganic fluxes.
For hand application using a squeeze bottle, syringe, or spatula, ensure that all areas of the pre-tinned hole are evenly covered on the side to be soldered. For screening applications, properly clean and prepare the screen, then apply the masking agent in the same manner as solder paste. Automatic dispensing equipment may also be used as appropriate. Allow an hour to fully cure a 10 mil thick application; thicker applications will require additional cure time. Rapid cure can be achieved in a 120°F/120°C oven.
After allowing the mask to become fully cured, the mask may be washed away in an open or closed loop aqueous cleaning system with a water temperature at a minimum of 120°F/49°C under agitation. If using a recirculating system, install a minimum 10-micron bag filter before the resin beds. Detergents may be used to increase cleaning efficiency.
Key Features:
- Easily removed in water cleaning cycles
- Does not coat filtration equipment
- Noncorrosive; safe for sensitive contacts
- Removed with inexpensive filters, increasing the life span of activated carbon/resin beds
Typical Applications:
- Ideal for use with closed loop cleaning systems
- Increases productivity by reducing cleaning system maintenance
- Short-term high-temperature protection from molten solder to 515°F/268°C
Product Key Properties: Low foaming, water filterable temporary solder masking agent. Protects boards from molten solder to 515°F (268°C). Waste stream filterable with micron bags. Prolongs deionized water system life. Compatible with most flux types. Leaves no corrosive residue. Does not contain Methanol. Non-contaminating. US Patent Number 6,207,265
Product Performance Benefits:
- Easily removed in water cleaning cycles
- Does not coat filtration equipment
- Noncorrosive; safe for sensitive contacts
- Removed with inexpensive filters, increasing the life span of activated carbon/resin beds