1. The process starts by removing worn tea glass molds from machines and bringing them into the molding
room. Especially the top sections of molds are worn, the glass contacts with metal surface causing too
many neck cracks.
2. Worn molds are cleaned before applying wax polish. The caustic (sodium hydroxide) cleaning water is at
90°C. Wax polishes on the molds are dissolved by boiling the molds in caustic water for 30 minutes.
3. The molds kept in caustic water for 30 minutes are then washed with cold water until all cork residues are
cleaned.
4. The washed molds are air-dried.
5. Linseed oil composition is consisted of 3 components; thin linseed oil, thick linseed oil and graphite. The
mixture ratios are 400 / 1600 / 300 grams, respectively, and the mixture weighs 2 kilograms in total.
6. This mixture is applied to the mold by using 1inch brush and distributing equally. The stay time of molds is
approximately 7 hours. This period might be shorter / longer depending on quality of wax polish applied.
7. The lubricated molds are placed in cork dust and the molds are covered with this dust.
8. The molds are kept in cork dust for approximately 30 minutes.
9. Excessive cork dust on the molds kept in cork dust is removed.
10. The molds are kept in furnace at 335 °C for 25 minutes. The molds are taken out from the furnace and then
cooled; the molds are ready to use after cleaning the discharge holes.