Lapping and Polishing Slurries


Milled alkaline alumina suspensions

ULTRA-SOL® milled alkaline alumina suspensions are unique permanent suspensions of our industry standard ULTRA-SOL® aluminum oxide abrasive powders. The alkaline chemistry combined with the high-purity (> 99.99 %) alumina powders provide an optimum solution for critical needs in precision polishing of optical materials, electro-optical materials, laser crystals, ophthalmic lenses, and in metallurgical specimen preparation.

ULTRA-SOL® M5PS, M15PS, M30PS, and M100PS agglomerate-free alumina suspensions are manufactured from our ULTRA-SOL® series of agglomerate- free aluminum oxide powders. They are typically used in critical polishing applications to produce surface finishes approaching a few angstroms. Please note that the data below represents functional particle sizes, which are typically smaller than measured with standard light scattering metrology. These are indicative of how the particle will act under pressure in a polishing application.


99.99 % pure aluminum oxide abrasives & suspensions

Small particle sizes ideal for intermediate and final polishing of many different materials

Abrasives milled and deagglomerated to create controlled, consistent particle size distribution, reducing scratches

Unique blend of alpha & gamma phase alumina to yield best balance of rate and finish

Product Specifications

Base material

Aluminum oxide

Shelf life

12 months

Product Specifications

Base material


Shelf life

24 months


Ceramic, fused silica,
glass, poly carbonate lens

Template variations Compressibility Particle size [μm] pH Solids content [%]
ULTRA-SOL® M5PS Aluminum oxide 0,80 8,5 15,0
ULTRA-SOL® M5PS2 Aluminum oxide 0,90 8,5 15,0
ULTRA-SOL® M15PS Aluminum oxide 0,30 8,0 15,0
ULTRA-SOL® M30PS Aluminum oxide 0,10 8,5 14,0
ULTRA-SOL® M100PS Aluminum oxide 0,05 8,5 10,5

Interested in our
slurry products and solutions?

We are happy to share our knowledge with you and remain at your disposal for any further questions.

Adam Nielsen