EP-LP09S
Typical application: Precision polishing of large flat crystals and diamond products
EP-LP
Seven grades, TREO ≥ 92%, D50 from 3.2 μm down to 0.8 μm. Choose by substrate and target finish: crystal and rhinestone need cut rate, cover glass needs few surface defects, wafers need a small D100.
| Grade | Appearance | TREO | Fluorine | pH | D50 (μm) | D100 (μm) | Typical application |
|---|---|---|---|---|---|---|---|
| EP-LP09S | White or gray powder | ≥92 | 0 | 6.0–8.0 | 1.8–2.0 | <12 | Precision polishing of large flat crystals and diamond products |
| EP-LP11S | White or gray powder | ≥92 | 2–6 | 6.0–8.0 | 2.30–3.20 | <11.93 | Optical components and phone covers with general precision requirements |
| EP-LP09P | White or gray powder | ≥92 | 2–6 | 6.0–8.0 | 1.6–2.0 | <10 | High-precision covers, flat glass, TFT-LCD substrates, 3D cover glass |
| EP-LP10S | White or gray powder | ≥92 | 2–6 | 6.0–8.0 | 0.80–1.30 | <6 | Precision optics, silicon wafers, large glass covers |
| EP-LP07XS | Red powder | ≥92 | 4–6 | 6.0–8.0 | 1.3–1.7 | <9 | High-precision covers, flat glass, TFT-LCD, 3D cover glass |
| EP-LP01LS | White or gray powder | ≥92 | 3–7 | 6.0–8.0 | 0.8–1.4 | <6 | Large flat glass, silicon wafers, optical glass |
| EP-LP08S | White or gray powder | ≥92 | 3–7 | 6.0–8.0 | 0.85–1.25 | <6 | Large flat glass, silicon wafers, optical glass (parallel grade to 01LS) |
The two digits are an internal product number, not a particle size. 09S and 09P sit at a similar d50 but differ in d100 — which is exactly why selection runs on d50 and d100 rather than on the number. S / P / XS / LS are internal suffixes; within a suffix, these two figures are what actually differ. Send the substrate and target finish and we will name the grade.
Every figure on this page comes from the COA and TDS shipped with the goods. Grades that are not measured are listed by code only.
ENGINEERING NOTES
In cerium-based powders fluorine tunes chemical activity. Higher F cuts faster but over-etches; lower F gives a better surface but slower removal. The 0 / 2–6 / 3–7 / 4–6 bands are the adjustment knob for different substrates.
Scratches almost always come from the coarse tail. Control D100 and you control the defect rate — every grade in the table states it.
A neutral 6.0–8.0 range keeps post-polish cleaning light and is gentler on equipment.
CeO₂ / TREO
TREO is total rare-earth oxide; CeO₂ is the cerium inside it. Their ratio is what makes a grade "high-ceria" or "mid-ceria", and both the price band and the cutting behaviour follow from it. The table on this page lists TREO because it is measured on every COA; the CeO₂/TREO ratio, LOI and surface area are reported per batch on the COA — ask for the batch you are buying. The corollary: a quotation that states "99.9% purity" but no D50 and no CeO₂ cannot be compared with another one.
Red powder has a steady field record in cover-glass and 3D curved glass polishing: its balance of removal rate against surface quality sits further forward than white powder. Samples are kept in stock so you can trial before committing to volume.
Typical application: Precision polishing of large flat crystals and diamond products
Typical application: Optical components and phone covers with general precision requirements
Typical application: High-precision covers, flat glass, TFT-LCD substrates, 3D cover glass
Typical application: Precision optics, silicon wafers, large glass covers
Typical application: High-precision covers, flat glass, TFT-LCD, 3D cover glass
Typical application: Large flat glass, silicon wafers, optical glass
Typical application: Large flat glass, silicon wafers, optical glass (parallel grade to 01LS)
Two polishing powders can share a D50 of 1.5 μm and behave nothing alike. One gives a clean mirror; the other produces scratches that only appear after the wipe. The difference lives in the coarse tail, and a D50-only specification hides it.
Read the note →Material, machine, target result: three lines are enough. Grade recommendation within 48 hours; standard grades in stock, samples in 3–5 working days.
Get a grade recommendation peter@ef-global.cn