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Determination of Cleanliness and Corrosion of Computer Parts by Tristimulus Colorimetry

IP.com Disclosure Number: IPCOM000104031D
Original Publication Date: 1993-Feb-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 26K

Publishing Venue

IBM

Related People

Chen, HH: AUTHOR [+2]

Abstract

Tristimulus colorimetry is used to determine surface cleanliness and corrosion of computer parts. For determining cleanliness of a part, a 3-inch long and 1/2-inch wide transparent adhesive tape is firmly applied onto a selected surface of the test part. The tape along with particulate contaminants is removed from the test surface and firmly applied onto a white paper. The tristimulus values of the contaminated tape are then measured with a tristimulus colorimeter. In the same manner, the tristimulus values of a clean tape on the same white paper are measured. The color difference between the contaminated and noncontaminated tapes reflects the amount of contaminant transferred from the test part to the tape; the higher the reading, the dirtier the part.

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This is the abbreviated version, containing approximately 100% of the total text.

Determination of Cleanliness and Corrosion of Computer Parts by Tristimulus Colorimetry

      Tristimulus colorimetry is used to determine surface
cleanliness and corrosion of computer parts.
     For determining cleanliness of a part, a 3-inch long and
1/2-inch wide transparent adhesive tape is firmly applied onto a
selected surface of the test part.  The tape along with particulate
contaminants is removed from the test surface and firmly applied onto
a white paper.  The tristimulus values of the contaminated tape are
then measured with a tristimulus colorimeter.  In the same manner,
the tristimulus values of a clean tape on the same white paper are
measured.  The color difference between the contaminated and
noncontaminated tapes reflects the amount of contaminant transferred
from the test part to the tape;  the higher the reading, the dirtier
the part.
     For determining corrosion of a metal part, an adhesive tape is
not needed.  The tristimulus values of both corroded part and
uncorroded parts are directly measured with a tristimulus
colorimeter.  The color difference between the two parts reflects the
degree of corrosion of the test part.

Disclosed Anonymously.