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Acrylic Mirror Sheet: Silver Sprayed on Acrylic Treated with Tannin in Water and Methanol
Philips' Ponjee and Verwijlen (US 4,639,382, 1987) made silver hold on acrylic by first dipping it in tannin dissolved in water mixed with an organic solvent; tannin in plain water gave no bond. This is their methanol solution: 45–70 % water, 30–55 % methanol by volume, 2.7–4.3 g tannin per litre, which gave full bonding in their cross-cut test. The sheet is then sensitised with weak stannous chloride and silvered by spraying the silver solution and the reducer together.
The picture: our diagram.
Katamtaman
2 hours
Mga Tagubilin
1
1
Dip in tannin solution for one minute
Dip in tannin solution for one minute
Make a solution of 2.7–4.3 g of tannic acid per litre in 45–70 % water and 30–55 % methanol by volume. Dip the acrylic sheet in it for one minute.
Mga materyales para sa hakbang na ito:
Lapad na Akriliko1 pirasoMga kailangang kasangkapan:
Tannic Acid
Methanol
Distiladong Tubig
Mga trey na salamin
Silindrong may sukatan
Timbangang panimbang
Kabinet ng usok (may tubo)
Gwantes na goma2
2
Rinse with water
Rinse with water
Rinse the sheet with water.
Mga kailangang kasangkapan:
Distiladong Tubig
Bote ng Panlinis3
3
Spray with stannous chloride for 12 seconds
Spray with stannous chloride for 12 seconds
Spray the face to be silvered with a solution of 0.1 g stannous chloride and 0.1 ml concentrated hydrochloric acid per litre of water, for 12 seconds. Rinse off the excess with water.
Mga kailangang kasangkapan:
Stannous Chloride
Hydrochloric acidDistiladong Tubig
Boteng pang-ambon ng tubigBote ng Panlinis
Salamin Laban sa Tilamsik ng KemikalGwantes na goma4
4
Spray silver and reducer together
Spray silver and reducer together
Atomise two solutions onto the face at the same time: silver nitrate with ammonia in water, and formalin in water. The patent gives no strengths: as required. Ours: a twin-nozzle spray gun.
Mga materyales para sa hakbang na ito:
Silver Nitrate1 as requiredMga kailangang kasangkapan:
Solusyon ng ammonia - 25-28 %
Solusyon ng formaldehyde (37 % na formalin)Distiladong Tubig
Spray Gun na May Dalawang NozzleKabinet ng usok (may tubo)Salamin Laban sa Tilamsik ng KemikalGwantes na gomaMga Materyales
2- 1 pirasoPlaceholder
- 1 as requiredPlaceholder
Mga Kinakailangang Kasangkapan
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