我也谈谈DIY干板工艺和配方

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Part C:    Silvernitrate                   5.2 g

          Distilledwater, room temp         22 ml

Dissolve, cover, and hold at 43C.

组分C：硝酸银                            5.2克

            蒸馏水（室温）               22毫升

溶解并加盖，水浴恒温至43摄氏度。

Turn the heat off the waterbath. Make surethe temperature is not above 43C.If it is, add a little ice water through the thermometer hole. (I keep a washbottle in the refrigerator to cool down the waterbath if necessary. Temperaturecontrol is our friend.)

关闭水浴，一定确保温度在43摄氏度以下，如果温度过高，可以用冰水降温。（我常年在冰箱里冷藏一瓶用来降温的水。 #后面这句貌似是说带温控开关的水浴锅是最好的选择，不过也无所谓了。#）

#此时，在水浴锅里的组分有A、C。在室温下放置的组分有B、D.#

Under red or dark amber safelight:

以下操作需在红色或暗室安全灯下

** sure you know which is which, haveParts B and C at the handy. Over 5 seconds time, with slow stirring, add Part Bto Part A through a small funnel (0.5 cmoutlet) held right above the gelatin mixture. Immediately add Part C in thesame manner. Stir an additional 30 sec. Stop stirring. Pull the waterbath offthe hot plate. Ripen the mixture without stirring for 15 minutes. Make sure thewaterbath temperature stays between 40 and 43C. (Make a note of the temperature curve over the 15minutes for future reference and recipe refinement.)

首先要确保你在暗光下能准确分辨出4种组分，并将B和C放在手边。在不停缓慢搅拌的过程中，在5秒钟内，将组分B通过一个小漏斗加入组分A中，小漏斗应该刚好放置在明胶混合物的正上方。并用同样的方法立刻添加组分C。#75毫升漏斗就行# 再额外搅拌30秒。停止搅拌。将水浴锅从加热板上移走。  #因为作者用的是磁加热搅拌器#   熟化混合物15分钟，期间不能搅拌。确保熟化过程中温度保持在40到43摄氏度之间。（你可以在这15分钟里每隔1分钟记录下温度下降的曲线，以便于为你在将来重复本工艺或者改进配方时提供参考。）

#该作者的思路是，加热盘加温控温，到了组分都到达43摄氏度后，关闭加热装置，在关闭后的第一个一分钟内做完加料和搅拌工作，然后撤掉加热装置，使水浴装置自然冷却，使其在15分钟内温度控制在40-43摄氏度之间。但是，15分钟内温度不可能只下降3度，所以需要你记录温度下降的曲线，以便于在温度比如41度时再重新开始加温，加温到42度，然后再取下来，这就需要你做非常详细的记录，以便你以后再做的时候知道什么时候重新加热，什么时候再拿下来。但我的思路很简单，就是准备2个水浴锅，一个如标准工艺操作，另一个直接恒温41摄氏度，熟化15分钟的时候，直接拿出来放2号水浴锅就行了。#

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Fluff the Part D gelatin with a plasticfork. Sprinkle/scrape it into the hot mix. Gently press in under the su**ceand give a gentle stir. Ripen with only two short stirs another 15 minutes. (Agentle stir and scrape from the bottom at 5 minutes and 10 minutes.) The heatshould stay between 40 and 42Cdegrees. It may be necessary to slide the waterbath back onto the hot plate.

用塑料叉子将D组分的明胶捣碎，扒散，弄成均匀的碎末，然后把明胶加入到热的混合物中。轻柔的将明胶压到混合物的表面以下并轻柔的搅拌均匀即可。再次熟化15分钟，只在第5、第10分钟的时候进行2次简短的搅拌，搅拌的时候务必轻柔，并上下搅动。#这个上下搅动的意思就是，吃鱼汤泡饭的时候把鱼汤加进去然后用勺子插进去把饭从碗底翻上来那样充分的搅动，而平常的搅拌就是画圈搅拌。# 熟化时温度应该控制在40至42摄氏度，此时把水浴锅再次移至加热盘上是很有必要的。# 如果用我的思路，这就很简单了，反正2号水浴锅也是41度恒温。但此步骤暗含一个结果，就是你必须要保证在二次熟化之后，你后加进去的明胶已经完全融化，烧杯中是均一的乳剂，而不能有没化完的结块#

Pour the melt into a ziploc sandwich bagresting in ice water. Seal the bag and refrigerate in a light proof container at least 4 hrs.  (Note: This time period is an emulsion variable.  Be consistent, or, keep a record of theinterval between sessions.)

把乳剂倒到一个泡在冰水里的三明治自封袋里。# 随便啥自封袋都行。# 封上袋子，并装入一个避光的容器里冷藏至少4小时。（注意：这个冷藏时间可以改变乳剂的感光特性，如果你要重复制作干板乳剂，请保持每次时间一致，或者对不同的冷藏时间的乳剂进行登记，以便寻找最佳配比或者实验不同乳剂的感光特性。）

# 第一部分结束#

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已经整理了一晚上了，我得睡了，过几天弄第二部分，一共3个部分。

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Second Session: Preheat waterbath to 55C. Have a 400 ml beaker ready.

第二阶段：先将水浴预热至55度恒温，并准备一个400毫升烧杯。

Washing the gelatin: In the dark or undersafelight, put the baggie of refrigerated silver gelatin in another lightproofcontainer at room temperature and let warm a bit (approx. � hour). It will betoo stiff to noodle otherwise. Bare in mind the time/temperature component ofripening. You don’t want the gelatin to get too warm or sit around too long orthe sensitivity curve will become an unknown - at the worst to the point offog. If the lump of gelatin is still too hard to squeeze through the ricer whenyou get started, you can tear off smaller pieces with your latex-glovedfingers, ** very sure you don’t drop any.

冲洗明胶：在暗处或暗室灯下，把冷藏的银胶从袋子里转移至另一个避光的容器中，并放置在室温下使其升温少许（大约？小时 #我估计是1/2小时#），否则明胶会太硬没法被挤成面条状。你也绝不希望你的明胶温度太高或者拿出来时间太长以至于乳剂的感光曲线会发生未知的变化——最差的情况是当你用ricer #手拧饸饹机# 挤出乳剂的时候里面仍然有很硬的硬块，这样的情况会导致底片产生雾点。你也可以带着乳胶手套把乳剂撕成均匀的小片，不管如何操作，要保证乳剂没有被遗漏的部分。

Have a large quantity of ice wateravailable (tap water or filtered, depending on your water quality � distilledis not required and may even be detrimental). I fill a Coleman drink containerwith crushed ice from the corner market and keep it covered with tap waterthrough the washing cycles. Set a jelly straining bag in a half gallon sizeColeman cold thermos, turning the top of the bag over the edge of the thermos.Pull the drawstring securely and tie with a bow tie. Fill with ice water(strain out any pieces of ice). Set the open potato ricer bowl in the ice waterin the thermos. Go to safelight.

准备大量的带冰的冰水（自来水或过滤的水都可以，这取决于你当地的水质情况，没必要使用蒸馏水，甚至蒸馏水会对下面得操作产生负面影响。 #此处我存疑，如果他希望水中的矿物质对乳剂有所作用，那么此步绝对是不可控制的因素，在成熟的工艺中是应当极力避免的，所以我认为应该使用蒸馏水，或者始终使用同一品牌的纯净水#）下面一大段我纯意译了。

首先要在一个很大的保温箱（Coleman保温箱）里保存大量的冰水，确保冰块覆盖在水的上面，以便于后面的水洗使用。在一个2升的保温杯里（Colemancold thermos  #建议用给病人带饭的那种带玻璃内胆的保温桶即可#）放入一个过滤袋（jelly straining bag  #其实就是一个网眼比较细的网兜，过滤用的，自己用纱布缝一个就行了，2层就行，千万别厚 #）把过滤袋的的袋口反过来紧紧的套在保温杯外层袋子放在保温杯里，装满去除了冰块的冰水。把手拧饸饹机放在冰水里，然后进入暗室。

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Open the baggie of gelatin and turn it outinto the ricer bowl. Keeping the ricer holes under the ice water and inside thejelly strainer bag, squeeze out the threads/抧oodles�. With a small rubber scraper or plastic spoon make sure allthe gelatin gets into the bag. Pull the drawstring very tight and tie in a bowtie. Wrap the neck tightly with a rubber band. Drop the bag in the ice waterand put the lid securely on the thermos.

在暗室中打开装有明胶的袋子，并把明胶装入手拧饸饹机里。确保手拧饸饹机的出面孔泡在过滤袋里的冰水以下，开始把明胶挤压出来，挤成面条状。并用塑料勺子不停的按压手拧饸饹机的内腔，确保所有的明胶都被挤进袋子里。然后把过滤袋袋口扎紧，再在颈部用橡皮筋扎紧，把袋子放进冰水中，并且盖上保温杯的盖子。

Over the next approximately 1 and a halfhours, wash the noodles. (Note: I have checked the pH after each 5 minutechange of water, and the pH lowering curves were identical from 10 to 7.8 fortwo separate trials. You need to get the pH between 7 and 8, but over-washingis to be avoided. I don抰 think it is necessary to check the pH if a careful and consistentwash cycle is maintained.)

静置大约90分钟后，开始洗涤面条状的明胶。（注意：我曾经测试过每次5分钟水洗后的冰水的pH，并且在pH从10下降到7.8的过程中，每两次换水操作之间pH的下降曲线是完全一样的，你应当通过水洗把pH降至7-8之间，而且一定要避免过度的水洗。如果你完全严格按照我的操作执行水洗循环，我并不认为你也需要像我一样测试pH。）

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Set a timer for 5 minutes, and agitate thethermos like you would a big cylindrical film development tank. This is muchharder to describe than to do: Hold the thermos horizontally in front of you,one hand on the bottom and one hand on the lid. Tip back and forth with aquarter-clock rotation with each tilt. This is a gentle exercise; it justassures that the water is moving inside the container, but not beating up onthe contents.

设置一个每5分钟就提示一次的定时器，摇动保温杯的时候就像摇动显影罐的操作一样。操作如下：水平拿住保温杯，一手拿住盖子，一手拿住底部，每次转动90度的罐子的同时，前后摇动一下保温杯。确保动作非常轻柔，一定要保证保温杯里的水只是在流动，而不是在冲刷里边的明胶面条。

After 5 minutes, open the thermos and pouroff the old water. Remove the jelly bag and gently squeeze out some of thewater. (The point isn抰 to squeeze it completely dry). Strain in new ice water and repeatcycle. It takes me about 1-1/2 hours to make 12 water exchanges.

5分钟后，打开保温杯倒出旧水，取出过滤袋，稍稍挤压出袋子里的水。（不要用想把袋子拧干那样大的力。）加入新的冰水，开始循环，一共需要循环12次，费时60-90分钟。

For the first two 5-minutes washes, Iagitated the entire time. After that I agitated one minute, let the thermos sitfor three minutes and agitated again during the last minute. Since the thermosis light tight, this allows time for breaks and for staging the coatingprocess. Just make sure to go back to safelight each time the thermos isopened.

前2次5分钟的水洗，需要整个5分钟都在摇动保温杯。此后的10次操作，都只需要在最开始摇动1分钟，静置3分钟后，再摇动1分钟。保温杯请务必选用不透光的材质制作的，它在以后的工艺中还得接着用，每次打开保温杯的时候一定要在暗室内操作。# 要我说，就压根在暗室里不出去了#

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After the last wash, remove the bag and squeeze out as much water as possible. Open the bag and carefully turn the noodles into a 400 ml  beaker (a wide mouth plastic canning funnel helps). Have a bowl of ice water and a gold mesh coffee filter at hand. Turn the bag inside out under the ice water and agitate gently to wash the noodles off the bag. Strain the wash water through the coffee filter and return the captured noodles to the beaker. Check the sides of the funnel and scrape down any noodles that have clung to the sides. (Note: don抰 wash them down.) The point of all this is to get as many last pieces of silvered gelatin as possible. The gelatin/water balance is an important variable.

在最后的水洗之后，把过滤袋拿出来，并且挤压里面的水分，能拧多干就拧多干。打开袋子，把明胶面条倒入400毫升的烧杯中（一个塑料的大漏斗会让该操作很容易完成）。准备一大碗冰水和一个金质的咖啡过滤网 # 别怀疑，真的是金质的，我还查了下需要20刀。总之还是明胶不能和金属接触，所以他用了特别稳定的金质的。咱们就用塑料的，但是网眼得很密的才行，目测500目。最后我的想法是，用一个塑料的杯筛，把底部的金属过滤网去掉，然后弄一层棉布做过滤网，我打算用热胶枪试试能不能粘一起。# 在冰水里把袋子的内层翻出来，轻轻晃动袋子，把附着在上面的明胶面条洗下来。用过滤网收集，过滤明胶面条的水分后，将明胶面条放入烧杯中。如果使用了漏斗也需要把漏斗上附着的明胶尽可能干净的刮进烧杯中（千万别用水冲）。此步操作的关键在于，要尽可能多的将明胶收集起来。明胶和水的比例是一个对乳剂性质非常重要的变量。



Set the beaker in the 55C waterbath. Watch the temperature of the bath. It will immediately drop below 40C. Turn the heat up and place a separate thermometer in the gelatin. Gently stir the gelatin every 5 minutes until it hits 40C. (Stirring procedure: with the handle of a plastic spoon, slowly sweep clockwise around the inside of the beaker, make an X across the bottom, followed by another slow sweep around the sides, this time counterclockwise.)

准备一个55摄氏度的水浴锅，将前一步的烧杯放在水浴锅中，仔细观察水浴锅中的温度变化，温度会立刻降至40摄氏度以下。此时继续加热水浴锅，并在烧杯中放入温度计，观察明胶乳剂的温度。每隔5分钟就轻柔的搅拌明胶乳剂，直到乳剂到达40摄氏度。（搅拌的过程：用一个塑料勺子在烧杯内做顺时针搅拌后，再伸入烧杯底部做X形搅拌，之后顺势贴着烧杯壁做逆时针的缓慢搅拌。）

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Drop in a magnetic stirring bar and add

2 drops Steigmann standard aurous ammoniumthiocyanate solution

Slowly stir for 30 seconds.

当乳剂达到40摄氏度是，加入搅拌的磁子，并滴加

2滴Steigmann标准金硫氰酸铵溶液     # 其实就是金增感剂#

然后缓慢搅拌30秒。

Complete digestion without stirring:Continue to bring up the temperature of the waterbath to 52C, keeping a watchful eye. (A smallflashlight with the lens covered with red filter film is invaluable in thedarkroom.)  When it hits 50C, turn down the temperature so that theresidual heat on the plate doesn抰 cause the bath to over-shoot 52C. Have ice handy to drop into the waterbath ifovershooting starts to happen. At the same time, watch the temperature of thegelatin. When it hits 52C,remove the beaker from the water bath. With a gentle stir every 5 minutes,watch the temperature until it hits 40C.When it does, stir in thoroughly

此后停止搅拌，完全熟化：将水浴持续加热至52摄氏度，并且保证能观察到实验细节。（此时一个带有红色滤色片的手电是非常关键的。）当水浴锅温度到达50摄氏度时，降低温度保证加热板上的余热不会使水浴锅的温度超过52摄氏度。最好在手边备有冰块，以备不测。同时，观察明胶乳剂的温度，当乳剂到达52摄氏度时，将烧杯从水浴中移出并轻柔的搅拌5分钟，观察乳剂温度，直至40摄氏度，当到达40摄氏度后，充分的搅拌乳剂，使其均匀。

5 ml Everclear

再加入5毫升95%的酒精

Strain the emulsion through a gold meshcoffee filter into another 400 ml beaker or similar wide-mouthed container.Ladle the emulsion onto prepared plates and coat.

用金质咖啡滤网过滤乳剂，将乳剂过滤至另一个400毫升烧杯或者其他的敞口容器中。就可以在预先准备好的玻璃板上涂布了。#此时普通的塑料滤网也应该能满足要求#

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第二阶段结束

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第三阶段：主要是是备注和说明部分

Turn out all the lights, check againstlight leaks, and then go away for 8-plus hours. A glass of wine or a good chocolate is highly recommended at this time.

关掉所有的灯，然后检查暗室绝对不漏光，然后离开最少8个小时。强烈建议你在这段时间里享受一杯葡萄酒和一块高级巧克力。 # 我建议大家伙好好睡一觉~#

After at least 8 hours, go to safelight andcheck to be sure the plates are completely dry and then carefully remove themylar backing. Load into holders or stack with interleaving in a light-tightpaper safe.

至少8小时后，进入暗室，检查干板乳剂是否已经彻底干透，然后小心的将玻璃板背面的塑料膜（mylar）去掉。干板就可以装进片盒，或者码放在避光的纸盒里。

Note

说明

1) Steigmann standard aurous ammoniumthiocyanate solution:

Add 6.0 ml of a 1% gold chloride solutionto 50 ml of a 1% ammonium thiocyanate solution, allowing it to clear beforeusing. (Store in dark dropper bottle.)

From SPSE Handbook of Photographic Scienceand Engineering, Edited by Woodlief Thomas, Jr., 1973, pp 518-519.

1）Steigmann标准金硫氰酸铵溶液

向50毫升1%的硫氰酸铵溶液中加入6毫升1%的氯化金溶液，使用前需澄清，取上层清液使用。（用棕色滴瓶避光储存）

配方引自WoodliefThomas, Jr所编辑的《照相科学与工程手册》1973版 518-519页。