Fixer: Kodak F-24

since: 2018/08/05
update: 2018/08/05
reference:
1. The Darkroom Cookbook 4th Edition

---------------------------------------------------------------------------

FORMULA#138(p.301)
Kodak F-24

說明:
Nonhardening Acid Fixer
非硬化酸定影劑

Fixer without hardener is preferred for prints that are to be toned.
不使用固化劑的定影劑適用於要調色的印花。

Prints without hardener are also easier to wash and retouch with spotting fluid.
沒有固化劑的打印件也更易於使用點樣液進行清洗和潤飾。

F-24 works well with pyro negatives, although care must be taken to avoid scratching while wet.
F-24適用於高溫負片，但必須注意避免在潮濕時劃傷。

The reason F-24 is a good choice for pyro is that it is less acidic, using sodium bisulfite instead of the stronger 28% glacial acetic acid found in many formulas.
F-24是熱解的一個好選擇的原因是它的酸性較低，使用亞硫酸氫鈉代替許多配方中發現的28％冰醋酸。

Fixer that are too acid tend to remove desirable pyro stain.
過酸的定影劑往往會去除所需的熱解染色。

Hardener is not necessary with pyro since the developer create its own hardening effect.
由於顯影劑創造了自己的硬化效果，因此熱解不需要使用固化劑。

配方:
Water at 125F/52C, 500.0ml

海波 (硫代硫酸鈉)
Sodium thiosulfate, 240.0g

亞硫酸鈉
Sodium sulfite, 10.0g

亞硫酸氫鈉(酸式亞硫酸鈉、重亞硫酸鈉)
Sodium bisulfite, 25.0g

Water to make 1.0 liter
加水至 1升

備註:
*Substituting 22.0 grams of citric acid for the bisulfite will eliminate much of the odor associated with fixer.
用22.0克檸檬酸代替亞硫酸氫鈉將消除與定影劑有關的大部分氣味。

FILM: Film should be clear in 5 minutes and fully fixed in 10. Discard when the clearing time is close to 10 minutes.
膠片：膠片應在5分鐘內清除，並在10分鐘內完全固定。當清除時間接近10分鐘時丟棄。

PAPER: Use the two-bath method, 5 minutes in each bath. Do not use this fixer for the second bath if you intend to tone the print.
紙張：使用雙浴法，每次浴5分鐘。 如果您打算打印，請不要將此定影劑用於第二次浴缸。