Page 59 - Microsoft Word -Cow Book 10-06-09 final update.doc

RESIDUE IDENTIFICATION CHART

RESIDUE DESCRIPTION CAUSE REMOVAL PREVENTION

PROTEIN Blue rainbow hue 1.Using non-chlori- Chlorinated alkaline 1.Adequate pre-rinse
varnish like, "apple nated cleaner detergent 2.Proper cleaning
sauce" or yellow 2.Inadequate pre- w/proper use dilution
varnish-like rinse after each usage
appearance 3.Improper cleaning 3.Chlorinated alkaline
detergent

MILKSTONE White to yellow, Minerals from milk Acid wash Regular and proper
chalky white to grey cleaning procedures
water spots and film, coupled w/acidified
bluish cast to rinse
stainless steel.

FAT/ Hanging water drop- 1.Low water tempera- 1. Proper water tem- Regular and proper
lets or beading greasy tures perature, minimum of cleaning procedures
GREASE look, Greasy (white) 2.Improper detergent 120 deg F at end of coupled w/acidified
appearance, soft concentration, i.e., wash cycle. rinse
yellow films, dull alkaline detergent 2.Correct concentra-
surface solution below pH 10 tion of alkaline deter-
3. Regular use of gent
acids in place of 3. For removing heavy
alkaline detergent. deposits, use
4. Rinsing only (not chlorinated alkaline
washing) after detergent and acid
milking. rinse at twice the
recommended
strength.

MINERAL White (water-stone) 1.Rinse too hot, drop- Acid wash, at 1.Acid wash
(Calcium, chalky to gray out of minerals from recommended 2.Alkaline detergent
water supply
used has good water
strength, for a
Magnesium) 2.Failure to use acid minimum of 10 conditioning
detergents minutes. Repeat as (sequestering
3.No acidified rinse or necessary. properties )
using acid rinse with 3.Water softener or
hot water. treatment may be
4.Alkaline detergent necessary
used cannot handle 4. Acid rinse
hard water at present temperature below
concentration 120 deg F.

IRON Red to brown/black 1.Water supply Acid wash 1. Water treatment.
2.Using chlorine with 2. Proper selection of
high iron water sanitizer.
3. Regular effective
acid rinse.

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