110V / 120V supply only. This unit is built for standard North American household current (110V / 120V). Running it on 220V / 240V with the use of a transformer voids the warranty. Confirm your outlet voltage before powering on.
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Ottochem CR Blue is a mildly alkaline, ammonia-free ultrasonic cleaning concentrate formulated for the jewelry trade. It quickly removes buffing and polishing compounds — Tripoli, rouge, and white diamond — from gold, silver, platinum, brass, copper, and rhodium without harsh fumes. Its blend of sequestrants, surfactants, and emulsifiers delivers strong cleaning performance while remaining economical and biodegradable. Available in 1 Quart, 1 Gallon, and 5 Gallon sizes to suit any shop volume.
Features
Biodegradable, non-ammoniated concentrate formulated for tough cleaning jobs
Fast removal of buffing and polishing compounds (Tripoli, rouge, white diamond)
Safe for gold, silver, platinum, brass, copper, and rhodium
Optimized for heated ultrasonics; can be premixed or mixed directly in-tank
Economical 5–10% use concentration
Mildly alkaline formula — no harsh fumes
Specifications
Formula Type
Mildly alkaline concentrate
pH
11–12
Ammonia
Ammonia-free
Biodegradable
Yes
Use Concentration
5–10% by volume (10:1 to 20:1 water to concentrate)
Ultrasonic Temperature
120–140 °F (49–60 °C)
Ultrasonic Power
50 watts per gallon recommended minimum
Compatible Metals
Gold, silver, platinum, brass, copper, rhodium
Available Options
Part #
Size
123.600
1 Quart
123.601
1 Gallon
123.602
5 Gallon
Directions & Mixing
Standard Use Ratio
5–10% by volume (approx. 20:1 to 10:1 water to concentrate)
Strong Mix
Up to 1:8 (1 part concentrate to 8 parts water)
Ultrasonic Temperature
120–140 °F (49–60 °C)
Ultrasonic Power
50 watts per gallon recommended minimum
Make-Up
Add concentrate to water in the tank or premix; stir and heat to operating temperature
Rinse
Always follow with a clean water rinse
Bath Maintenance
Maintain concentration by periodic additions as soil load increases
Recommended Dilutions
Ratio
Application
20:1 (5%)
General purpose cleaning
10:1 (10%)
Polishing & buffing compound removal
Applications
Post-buff cleaning prior to finishing or stone setting
Pre-cleaning prior to plating
Shop maintenance cleaning of tools and fixtures
Notes
Caution: Mildly alkaline (pH 11–12). Avoid prolonged skin and eye contact; wash hands after handling.
Exercise caution with porous or chemically sensitive stones; test before use when in doubt.
Use appropriate PPE and follow equipment manufacturer guidelines.
California Prop 65 Warning: