Kodalk (Sodium Metaborate) 柯達平衡鹼的替代品

Kodalk (Sodium Metaborate - 偏硼酸鈉) 柯達平衡鹼，在某些配方中會出現，其麻煩的地方是難買，第一化工也沒有。據網友指出似乎有小間化工行有過報價，但卻是等無貨。

在一次論壇亂逛時意外發現此一替代品，這邊直接寫結論。

10g 的 Kodalk 可用 7.5g Borax and 1.5g Sodium Hydroxide 替代。

Borax 是硼砂，Sodium Hydroxide 是氫氧化鈉。此替代藥品據說是柯達自己公布的，是可信的。詳細的配藥過程是以莫耳數去計算，可參見來源網頁。

以下是節錄：

2NaOH + Na2B4o7(10H2O) + 5H2O <-->> 4NaBO2(4H2O)

2 mols lye + 1 mol Borax (in water) is equivalent to 4 mols Kodalk in water
80g lye + 381.37g Borax (in water) is equivalent to 551.42g Kodalk in water

divide each of these by 5.5142 and we have:

14.5g Sodium Hydroxide (Lye) + 69.2g Borax dissolved in water is equivalet to 100g of Kodalk (dissolved in water)

Of course, you may wish to divide by 55.142 to get...

1.45G Lye + 6.9g Borax (dissolved in water) is the equivalent of 10g of Kodalk dissolved in water.