This test is to test the resistance of enamels with lithium nitrate, citric acid and ketchup tests.
· The ETC test is applied on 820 ° C cooked plate without enamel in appropriate thickness (100-120 micron).
· 5% citric acid solution is applied to the middle part of the plate at the front surface. Care is taken to ensure that the plate to be acid tested is not hot. The test is applied to the plate at room temperature. 2-3 drops of citric acid solution is added to the area where the acid test will be applied. Cover with glass and leave for 15 minutes at room temperature. At the end of 15 minutes, the effect of acid on the surface is washed and washed with cold water. (AA, A, B, C) and recorded.
· After the acid test area has been established, lithium nitrate is placed into this area without the spatula. It is left in the oven at 320 ° C for 15 minutes. At the end of the 15 is removed from the oven and is expected to cool down for a while. The lithium nitrate freezes on the plate and the frozen lithium nitrate stain is washed with cold water and the effect on the surface is assessed according to the stain it leaves (AA, A, B, C) and recorded.
· 3-4 drops of ketchup are added to the acid test and lithium nitrate test area. Spatula spreads over this region. The plate is kept at 320 ° C for 30 minutes. Pre-prepared detergent with boiling water into the plate 10 min. It is suspended. At the end of 10 minutes, ketchup stain is tried to be removed. (Cleaned with a hard sponge.) The plate is washed and dried. Ketçab left on the stain and take care not to come out easily. The remaining stain is evaluated and recorded.