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Acrylic Mirror Sheet: Silver Sprayed on Tannin-Treated Acrylic

작성자

Charlie

20. 10월 2026

Acrylic Mirror Sheet: Silver Sprayed on Tannin-Treated Acrylic

Silver from a chemical bath barely sticks to acrylic: tannin in plain water gave no bond at all. Philips' Ponjee and Verwijlen (US 4,639,382, 1987) found that tannin dissolved in water mixed with an organic solvent such as ethanol makes the silver hold firmly, without etching or clouding the acrylic. The sheet is dipped for a minute, sensitised with a weak stannous chloride spray, then silvered by spraying the silver solution and the reducer together. In the patent's cross-cut test, no squares of silver came off. The picture: our diagram.

중급

2 hours

안내

Dip in tannin solution for one minute

Make a solution of 2.3–5.0 g of tannic acid per litre in water with 15–60 % ethanol by volume. Dip the acrylic sheet in it for one minute.

이 단계의 재료:

아크릴 판1 개

필요한 도구:

탄닌산

에탄올 - 실험실 등급, 95 %

증류수

유리 쟁반

눈금 실린더

접시 저울

고무장갑

Rinse with water

Rinse the sheet with water.

필요한 도구:

증류수

실험용 세척병

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.

필요한 도구:

염화제일주석

염산

증류수

분무기

실험용 세척병

화학물질 비산 보안경

고무장갑

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.

이 단계의 재료: