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Diamond polishing paste

Micro-Tec diamond polishing pastes are designed for polishing and cleaning of metals, alloys, glass, ceramics, semiconductors and other hard materials. They are also suitable for polishing metallographic and petrographic specimens and use an oil-based formula which can be applied using polishing cloths.

Micro-Tec diamond polishing compound is made from mono-crystalline synthetic, diamonds mixed with a mineral and vegetable oil-based compound. The diamond powder is micron graded and mixed into the colour-coded paste to distinguish between sizes. Oil-soluble carrier compounds bind the paste together very well – even when high speed polishing discs are used. Use lubricants or extenders which are compatible with oil-based (oil-soluble) diamond paste.

Available in 12 sizes from 0.5µm to 40µm and as a set containing one of each size – supplied in five syringes for easy application.        

Product Nr


Size µm Size range µm


ANSI Grit JIS Mesh


29-001579 Micro-Tec DP0.5 0.5 0 – 1 Beige 10,000 Final stage polishing
29-001580 Micro-Tec DP1 1 0 – 2 Yellow 2000 8,000
29-001581 Micro-Tec DP1.5 1.5 1 – 2.5 Pink 1,900 7,500
29-001582 Micro-Tec DP3.5 2.5 1.5 – 3.5 Purple 1,850 6,000 Lapping and fine polishing
29-001583 Micro-Tec DP3.5 3.5 2.5 – 4.5 Red 1,750 3,500
29-001585 Micro-Tec DP5 5 4 – 6 Light Blue 1,600 2,500
29-001587 Micro-Tec DP7 7 5 – 9 Navy Blue 1,300 2,200
29-001590 Micro-Tec DP10 10 7 – 13 Light Green 1,150 1,800 Coarse polishing and rapid stock removal
29-001591 Micro-Tec DP14 14 10 – 18 Dark Green 800 1,200
29-001592 Micro-Tec DP20 20 15 – 25 Brown/Grey 900 600
29-001593 Micro-Tec DP28 28 24 – 34 Black 450 550
29-001594 Micro-Tec DP40 40 34 – 48 Charcoal 320 360

Using diamond polishing pastes

Most grinding, lapping and polishing using diamond paste is done progressively – starting with a coarser grade and finishing with a finer grade. Make sure the specimen or work piece is thoroughly cleaned/rinsed before using a finer grade diamond paste. Apply the diamond paste on a billiard table-type cloth and spread evenly – a lubricant or extender (mixture of glycol / alcohol / water / detergent) can be used to thin the paste.

The grade to start with depends on the condition of the surface to be polished. If a micro-finish grinding or lapping paper is used prior to the polishing step, then one could start with the 10µm or 6µm grade and step down to 3µm and 0.5µm.  For coarser surfaces consider starting with 20-40µm grade and then gradually step down to 0.5µm.

Warning: diamond powder is a hard material and can easily be pressed into the surface of soft materials (e.g., aluminium, copper, tin etc.). Therefore, light pressure is recommended.

Ordering information: