---
title: Leneta ST-31 ASTM penetrating colourant | Novamart AG
url: https://novamart.ch/en/product/leneta-st-31-astm-penetrating-colourant/
language: en-GB
---

# Leneta ST-31 ASTM penetrating colourant | Novamart AG

> This is a proprietary composition of pigment and dark colourant dispersed in an organic liquid carrier. Recommended for ASTM method D 3258, stain resistance and porosity test.

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# Leneta ST-31 ASTM penetrating colourant

[Product overview](https://novamart.ch/en/product-catalogue-3/) / [Laboratory & Inspection](https://novamart.ch/en/product-category/laboratory_inspection/) / [Calibration & Standards](https://novamart.ch/en/product-category/laboratory_inspection/calibration-standards/) / Leneta ST-31 ASTM penetrating colourant

## Leneta ST-31 ASTM penetrating colourant

This is a proprietary composition of pigment and dark colourant dispersed in an organic liquid carrier. Recommended for ASTM method D 3258, stain resistance and porosity test.

SKU: Leneta ST-31Categories: [Scratching / rubbing](https://novamart.ch/en/product-category/measuring-instruments/_material_surface_layers/scratching-chafing/) , [Calibration & Standards](https://novamart.ch/en/product-category/laboratory_inspection/calibration-standards/)

- Description
- Additional information

**Test for stain resistance and porosity ST-31**

This is a protected **Composition of pigment and dark colourant** which are **organic liquid carrier** are dispersed. When applying and then removing from a colour film, the intensity of the resulting stain indicates the degree of porosity of the film. ST-31 is more effective than other media recommended for this purpose.

Both media have a **Perfect product stability** and are manufactured and controlled to ensure batch-to-batch consistency. Their usefulness extends not only to ASTM testing, but to any soil and stain removal test procedure. Supplied in 4 fl.oz. ( **118 ml** ) tins or jars.

### Specifications

- Type: penetrating colour (penetrating dye)
- Size: 4 fl oz / 118 ml
- Weight per container: 1/2 lb
- Containers per package: 4
- Minimum order: 1 container
- International standards: ASTM D3258

## Additional information

| brand | Leneta |
| --- | --- |
| Mission | Fleckenbeständigkeit & Porosität, Lackprüfung |
| Industry sectors | !!! Painters Coaters Printers |
| Substrates/substances | Coatings and printing inks |
| Standards | ASTM D3258 |

## Optional ...

- [Leneta SC-1 ASTM scouring agent - non-abrasive](https://novamart.ch/en/product/leneta-sc-1-astm-scouring-agent-non-abrasive/)
- [Leneta SC-2 ASTM scouring agent - abrasive](https://novamart.ch/en/product/leneta-sc-2-astm-abrasive-scouring-agent/)
- [Mould P121-10N Black abrasion resistance test panel](https://novamart.ch/en/product/form-p121-10n-black-abrasion-resistance-test-panel/)
- [Mould P123-10N White abrasion resistance test panel](https://novamart.ch/en/product/form-p123-10n-weisses-scheuerbestaendigkeits-testpaneel/)
- [Leneta ST-1 ASTM colourant pigmented](https://novamart.ch/en/product/leneta-st-1-astm-colourant-pigmented/)

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