Flatware Stainless Steel Frequently Asked Questions and Problems
A: Flatware Problem: Blue to blue-black discoloration over large surface areas, especially noticeable on spoon bowls.
Cause: Usually a reaction between detergent and hard water.
Cure: Remove with a boiling perforate (oxidizing agent, e.g. DIP-IT) cleaner or with a mild stainless steel polish. Type of detergent should be changed.
Comment: Even though you claim you be using the same brand name detergent, the manufacturer may have changed formulation.
B: Flatware Problem: Dark blue to black stains in spots or very small localized areas.
Cause: Chemical "burn" resulting from direct contact of detergent or certain foodstuffs, or trapped detergent solution improperly rinsed.
Cure: A good mild stainless steel polish will generally restore the finish.
Comment: Properly pre-mix powder or liquid detergent to recommended concentrations.
C: Flatware Problem: Rough white to gray areas having an etched appearance.
Cause: Soaking with aluminum or heavily chlorinated compounds such as bleach.
Cure: Damage may not be repairable but a mild stainless steel polish may help.
Comment: Cleaning procedure must be changed immediately.
D: Flatware Problem: Blisters or small rounded lumps usually seen on the spoon bowls.
Cause: Using aluminum containers or other aluminum items during the soaking/cleaning process.
Cure: None. The damage is irreparable.
Comment: Avoid use of aluminum containers and do not mix aluminum products with stainless when cleaning.
E: Flatware Problem: Pitting and rusting, particularly on knife blades.
Cause: Any of the items listed under "Harmful Practices".
Cure: Surface rush can be removed with a mild stainless steel polish. Pitting is irreparable.
Comment: IN particularly stubborn (repeated) cases the customer may have to be advised against using a dishwasher for knives.
F: Flatware Problem: The "black" is coming off on towels or tablecloths.
Cause: True blackening is extremely rugged and can usually only be removed chemically; i.e. silver dips or aluminum foil and detergent soak. Usually, it is impacted buffing compound coming off that, for one reason or another, was not removed in the plant.
Cure: A thorough washing with a small brush if necessary will remove the residual buffing compound.
Comment: This residue may be regarded as inert, i.e. non-toxic.
G: Flatware Problem: Brown stainless on the soldered seam of hollow handle knives.
Cause: Excessive exposure to highly alkaline cleaners which react with the copper in the solder.
Cure: If not too severe, the stain can be removed with a good stainless steel polish.
Comment: May be manufacturing defect.
