PremaSol 50A S/D Colloidal Silica is a medium sized spherical colloidal silica manufactured to provide excellent final finish on hard, brittle substrates. Ra finishes of 1 angstrom (atomic force microscope) have been achieved on many substrates. It can replace colloidal silicas in all applications.

 

PremaSol 50A S/D Colloidal Silica is formulated to dry soft in order to eliminate scratches caused by dried polish, and prevent polish equipment from being encrusted with hardened silica. It is easily rinsed from operator's skin, thus eliminating dry, chapped hands.

 

Specifications:

 

Total Solids: 29 – 31 wt%

Specific gravity: 1.2

pH 10 – 10.5

Particle size (d50) 50 nanometers (0.050 micron)

 

Applications:

 

PremaSol 50 S/D Colloidal Silica was formulated as a soft-drying polish for sapphire, ceramics, silicon carbide, gallium nitride, quartz and other hard substrates. It is also a good final polish for reclaiming silicon wafers because it will remove residual metals and particle defects* much better than conventional silica slurries. Use undiluted “as is” with a hard polishing pad. For sapphire and other very hard materials use high speed and high pressure with slurry recirculation. Do not use the slurry above ~ 140 deg. F (60 deg. C). For other applications use as you do any colloidal silica.

 

 **PremaSol 50A S/D Colloidal Silica is packaged in 1 Gal. Containers, 5 Gal Pails, & 55 Gallon Drums**