Miele Dishwasher Pielęgnacja i konserwacja - Strona 14

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Technical Information

2. Borosilicate glass:

3. Crystal glass:

4. Lead crystal glass:

Frequent washing changes the surface properties of glass even if it is

chemically resistant. In addition to the contact with water, the frequent

changes between wet and dry periods also play a role.

Usually it takes considerable time until signs of wear due to washing in a

dishwasher appear. In particular scratches are everyday signs of wear and

tear that sooner or later will appear on any glass washed regularly in a

dishwasher. Glasses contact each other and other items in the dishwasher,

particularly during loading and unloading. Water and detergent in

conjunction with temperature jumps between hot wash cycles and cooler

interim rinses, act to enlarge existing scratches and blemishes.

Lime cloudiness that can be removed with sufficient detergent dispensing or

the action of a low concentration acid without residues remaining is known

as reversible cloudiness. Such cloudiness is also an indication that the

water has too many hardening constituents such as magnesium and

calcium ions. In addition to mechanical damage and reversible cloudiness,

washing in a dishwasher can also cause irreversible evidence of

corrosion. Corrosion damage ranges from various types of cloudiness to

discoloration of various colors (from that resembling mother of pearl to

bluish, greenish or brownish shimmering).

More durable glass resistant to the effects of chemicals and

sharp temperature changes (cooking and baking, and laboratory

glassware).

Colorless, highly pure glass (table glassware, gift items) with

increased potassium content.

Glass with a particularly brilliant appearance and high specific

weight (cut glass, luxury items) with at least 24% lead oxide

content.