Potatoes
4. Colour and Cleanliness

This page is part of the Guidance Document Repository (GDR).

Looking for related documents?
Search for related documents in the Guidance Document Repository

There is no colour requirement for all grades of potatoes, such as, what you would normally see in a commodity like apples.

On the other hand, this does not exclude defects that affect the colour of the skin such as scald or healed over flesh nor does it exclude the requirement of not permitting artificial colour.

Note: Artificial colouring is not permitted in either grade.

Cleanliness is a very important part of the Canada No. 1 grade. Canada No. 1 potatoes are required to be reasonably clean.

"Reasonably clean" has been defined to mean:

  1. The potatoes are reasonably free from dirt; and
  2. Where the potatoes are in a container, there is not more than a slight amount of loose dirt or foreign material in the container.

Canada No. 2 potatoes shall not be more than slightly dirty.

"Slightly dirty" means:

  1. There is an appreciable amount of dirt adhering to the potatoes; and
  2. Where the potatoes are in a container, there is not more than a moderate amount of loose dirt or foreign material in the container.

A) Canada No. 1

Score when individual specimens:

  1. show caked dirt, mould or decayed matter on more than 5% of the surface in the aggregate. "Caked dirt" is dirt which is dried on and is difficult to remove; or
  2. have more than 15% of the surface in the aggregate lightly stained or covered by adhering soil.

B) Canada No. 2

Score when individual specimens:

  1. show caked dirt, mould or decayed matter on more than 25% of its surface in the aggregate; or
  2. have more than 50% of the surface in the aggregate covered by bad dirt stains and/or dirt.

The word "washed" may be used in connection with either grade of potatoes, if prior to being packed the potatoes have been washed and are clean. "Clean" means there is no adhering soil.

On a handwritten certificate, both colour and cleanliness will be shown on the certificate under the "Colour" heading. The colour will show the varietal colour. For example, "Red, washed, clean", "white, reasonably clean" or "white, mostly clean, some dirty". When a lot fails on account of dirty specimens, a description should be given in general terms under the "Colour" heading along with the phrase "See Grade Defects". In MCAP, only the colour will appear in the colour heading. Comments relative to cleanliness should be made under "Remarks". The actual percentage of failing specimens will be shown under the "Grade Defects" heading.

Date modified: