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Acrylic Mirror Sheet: Silver Sprayed on Acrylic Treated with Tannin in Water and Isopropanol
Charlie

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Charlie

21. Ukwakira 2026DE
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Acrylic Mirror Sheet: Silver Sprayed on Acrylic Treated with Tannin in Water and Isopropanol

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 isopropanol solution: 50–85 % water, 15–50 % isopropanol by volume, 3.0–5.0 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.
Hagati
2 hours

Amabwiriza

1

Dip in tannin solution for one minute

Make a solution of 3.0–5.0 g of tannic acid per litre in 50–85 % water and 15–50 % isopropanol by volume. Dip the acrylic sheet in it for one minute.

Ibikoresho by'iyi ntambwe:

Urupapuro rwa AkirilikiUrupapuro rwa Akiriliki1 igice

Ibikoresho bikenewe:

Acide ya taninikeAcide ya taninike
IsopuropanoliIsopuropanoli
Amazi YatunganyijweAmazi Yatunganyijwe
Amasahani y'ikirahureAmasahani y'ikirahure
Igipimo cy'ikirahure gifite imirongoIgipimo cy'ikirahure gifite imirongo
Umunzani w'ibiroUmunzani w'ibiro
Akabati k'umwotsi (gafite umuyoboro)Akabati k'umwotsi (gafite umuyoboro)
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
2

Rinse with water

Rinse the sheet with water.

Ibikoresho bikenewe:

Amazi YatunganyijweAmazi Yatunganyijwe
Icupa ryo gukarabaIcupa ryo gukaraba
3

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.

Ibikoresho bikenewe:

Kolorura ya sitaniKolorura ya sitani
Asidi ya kloridiriAsidi ya kloridiri
Amazi YatunganyijweAmazi Yatunganyijwe
Icupa ryo kuminjagira amaziIcupa ryo kuminjagira amazi
Icupa ryo gukarabaIcupa ryo gukaraba
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
4

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.

Ibikoresho by'iyi ntambwe:

Nitrate ya fezaNitrate ya feza1 as required

Ibikoresho bikenewe:

Umuti wa amoniyake wa 25-28 %Umuti wa amoniyake wa 25-28 %
Umuti wa fomaledehide (fomaline 37 %)Umuti wa fomaledehide (fomaline 37 %)
Amazi YatunganyijweAmazi Yatunganyijwe
Imbunda ishashaza ifite imiyoboro ibiriImbunda ishashaza ifite imiyoboro ibiri
Akabati k'umwotsi (gafite umuyoboro)Akabati k'umwotsi (gafite umuyoboro)
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu

Ibikoresho

2

Ibikoresho bikenewe

16

Iki gishushanyo gikora

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Acrylic Mirror Sheet: Silver Sprayed on Tannin-Treated Acrylic

Acrylic Mirror Sheet: Silver Sprayed on Tannin-Treated Acrylic

na CharlieDE

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