---
title: "ASTM C121"
url: "https://mat-cs.com/astm-c121/"
description: "This test method covers the determination of the water absorption of slate."
---

ASTM Standard

# ASTM C121

Standard Test Method for Water Absorption of Slate

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## Significance and Use

4.1 This test method is useful in indicating the differences in water absorption of slates. This test method also provides one element in the comparison of slates.

## Scope

1.1 This test method covers the determination of the water absorption of slate.

1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.