# Diamond Paste Grade Designations: What W1.5 Can and Cannot Tell You

> Learn what a W-series diamond paste designation can identify, what it cannot prove, and which datasheet and order fields still need confirmation.

Canonical: https://xtdiamond.com/insights/diamond-paste-grade-designations/
Published: 2026-11-06T11:54:33.737Z
Updated: 2026-11-06T11:54:33.737Z
Last reviewed: 2026-11-06T11:54:33.191Z
Reviewed by: Xintai Technical Desk

## TL;DR

A W-series designation is a useful grade reference, but it is not a complete diamond paste specification. It does not by itself establish the measurement method, full particle-size distribution, diamond content, carrier, consistency or suitability for your process. Match the designation to the selected partner factory’s current datasheet, then confirm the grade, tolerance, carrier, packaging and batch documents at quotation.

## What a grade designation is for

A designation gives buyer and supplier a shared label for a proposed abrasive grade. It helps narrow the discussion and link an enquiry to a datasheet. It is most useful when the manufacturer, document revision and product form are also identified.

A label on its own does not describe every property that matters at the machine. Two offers carrying similar shorthand still need to be compared through their respective specification systems and supporting documents.

W1.5 is used on this site only as an example configuration. It is not presented as a stock commitment or a universal process recommendation.

**Example grade configuration; final grade, tolerance and packaging confirmed at quotation.**

## What the label cannot establish by itself

| Specification question | Why the designation is not enough | What closes the gap |
|---|---|---|
| How is the grade defined? | The shorthand does not explain the producer’s designation system or acceptance criteria. | The selected partner factory’s current datasheet and stated grade definition. |
| How is size characterised? | A label does not provide the characterisation method or the full distribution. | The measurement method and batch information available from the manufacturing partner. |
| What else is in the paste? | The grade label does not define diamond content, carrier chemistry or consistency. | The product datasheet and the formulation details agreed for the order. |
| Will it fit the process? | Substrate, lap, applicator, fluids, cleaning and inspection all affect suitability. | A process review and, where useful, a buyer-side sample evaluation. |
| What arrives with the order? | The label does not define container, label, batch documents or dispatch paperwork. | The written quotation and order confirmation. |

## Why the datasheet and the label must stay together

Always read a designation in the context of the document that defines it. Check the partner factory’s identity, product family, grade designation, document date or revision, and the measurement terms used. If any of these are missing, ask for clarification before comparing offers.

For repeat supply, keep the accepted datasheet and sample record with the purchase specification. If the manufacturing partner changes a designation, method or document, the supply route should be reviewed rather than assuming the old and new labels are interchangeable.

Xintai coordinates this document trail as an independent supply partner. We do not issue our own material test certificates or replace the manufacturing partner’s characterisation with an unverified value.

## What to confirm before ordering

- The complete grade designation and the partner factory’s designation system.
- The current datasheet revision and the stated characterisation method.
- Carrier, consistency and any other paste properties relevant to the process.
- The accepted sample configuration and how it maps to the order.
- Grade tolerance, packaging, labelling and batch documents confirmed at quotation.
- The route for approving any document or specification change before repeat supply.

## Sources and notes

This article explains a documentation method, not a universal grading standard. No external standard is cited, and no particle-size, concentration or tolerance value is inferred from the example designation. Order-specific values must come from the selected partner factory’s current documents.

Last reviewed: 2026-11-06

## Key facts

- **Example designation:** W1.5 — Example grade configuration only; final grade, tolerance and packaging are confirmed at quotation.
- **What the label provides:** A shared grade reference — It must be read with the producer’s current datasheet.
- **What it does not provide:** A complete paste specification — Carrier, consistency, characterisation and documentation still need definition.
- **Comparison rule:** Compare documents, not shorthand alone — Do not assume similar labels from different routes are interchangeable.

## FAQ

### Does W1.5 define every property of the paste?

No. It is an example grade designation, not a complete specification. The current partner datasheet must define the grade, while carrier, consistency, packaging and batch documents are confirmed separately.

### Can two pastes with the same displayed grade be treated as identical?

Not without checking both specification systems and the process fit. Review the datasheet, characterisation method, carrier and sample performance before treating them as alternatives.

### What should accompany a grade in an RFQ?

Include the product form, current datasheet if available, substrate, process step, target result, carrier or cleaning constraints, quantity, destination and required batch documents.

## Sources and notes

Prepared by Xintai Technical Desk using general specification-review practice and the approved Xintai brief. W1.5 is an example grade configuration only. No numeric particle-size distribution, concentration, purity, tolerance or performance data is claimed or inferred. All order-specific values require confirmation against the selected partner factory’s current datasheet and at quotation.