The standard colorfastness ratings used in the crockmeter test are typically based on industry standards established by organizations such as the American Association of Textile Chemists and Colorists (AATCC) and the International Organization for Standardization (ISO).

The AATCC has a widely recognized colorfastness rating system that includes the following grades for color transfer or staining:

1. Excellent: No color transfer or staining.

1. Very Good: Slight color transfer or staining.

1. Good: Noticeable color transfer or staining.

1. Fair: Moderate color transfer or staining.

1. Poor: Severe color transfer or staining.

The ISO also provides a colorfastness rating system, which is similar to the AATCC system but uses numeric values ranging from 1 to 5:

1. Colorfastness grade 5: No color transfer or staining.

1. Colorfastness grade 4: Slight color transfer or staining.

1. Colorfastness grade 3: Moderate color transfer or staining.

1. Colorfastness grade 2: Marked color transfer or staining.

1. Colorfastness grade 1: Severe color transfer or staining.

These rating systems are used to assess the performance of materials subjected to the crockmeter test and provide a standardized way to communicate the colorfastness properties to manufacturers, retailers, and consumers.