手工皁製作原料 硬脂酸 stearic acid

硬脂酸 stearic acid ( 十八酸, 己基癸醇硬脂酸酯)
很少單獨存在於自然界裏，並非化學合成物，常以甘油酯的形態存在，硬脂酸在自然界的分佈很廣，存在於許多植物性油脂和動物性油脂中。

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動物脂肪中的含量比在植物油脂中的含量要高，如牛油中的含量可達24%，茶油爲0.8%，棕櫚油爲6%，但可可脂中的含量高達34%。

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硬脂酸實際上是45%硬脂酸和55%軟脂酸的混合物，並含有少量油酸，略帶脂肪氣味。

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生產方式
動物油與水在高溫高壓下反應，使甘油三酸酯水解。不飽和植物油與氫氣加成得到。

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硬脂酸在手工皁的應用主要是增加皁成品硬度。

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添加硬脂酸的手工皁成品，有刺激皮膚的可能性，也比較容易阻塞毛孔。

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硬脂酸添加比例爲3%~5%。

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建議計算氫氧化鈉時，計入硬脂酸皂化價

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添加硬脂酸方式，純硬脂酸融點69.4度，可先與耐熱油脂熱融，如椰子油棕櫚油，一起加熱融好，再跟其他油ㄧ起融礆。

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根據皁友心得:如沒併入一起計算ins值，可將計算後約INS90的手工皁配上3%硬脂酸，就可有理想的硬度。

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詢問商家的硬脂酸是那一種等級，應該是要買化妝品級的硬脂酸，購買三壓等級。
硬脂酸在手工皁的功能是增加皁的硬度。
操作方式 : 可先與耐熱的油一起熱融後再與其他的油一起融礆，如融礆後才加入，會加快Trace，需小心有假Trace情況發生。

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硬脂酸（三壓級）
STEARIC ACID

Specs No.:703-28602 Product Code:SA1801 Product Form:Beads

Property:
Acid Value 酸值201-213
Sapon Value 皂化值202-214
Iodine Value 碘值1.0max.
Titer(℃) 熔點54-56
Colour(5 1/4"Lovibond) 顏色Yellow 2.0max. Red 0.5max.
Composition(in%) Approx:
C12(Lauric)& Lower1max.
C14(Myristic)2max.
C16(Palmitic)68max.
C18(Stearic)30min.
C20(Arachidic)1max.
C18'(Oleic)1max.
Standard Packing: -- 25kgs net. in PP Woven with PE inner bag --600kgs net. in jumbo bag
Test Method:AOCS

硬脂酸（二壓級）
STEARIC ACID
Specs No.:703-28603 Product Code:SA1806 Product Form:Beads

Property:
Acid Value 酸值207-214
Sapon Value 皂化值208-215
Iodine Value 碘值3.0max.
Titer(℃) 熔點53min.
Colour(5 1/4"Lovibond) 顏色Yellow 5.0max. Red 1.5max.
Composition(in%) Approx:
C12(Lauric)& Lower1max.
C14(Myristic)2max.
C16(Palmitic)70max.
C18(Stearic)29min.
C20(Arachidic)1max.
C18'(Oleic)3max.
Standard Packing: -- 25kgs net. in PP Woven with PE inner bag -- 600kgs net. in jumbo bag
Test Method:AOCS

硬脂酸（一壓級）
STEARIC ACID
Specs No.:703-28604 Product Code:SA1810 Product Form:Beads

Property:
Acid Value 酸值185min.
Sapon Value 皂化值186min.
Iodine Value 碘值10max.
Titer(℃) 熔點50min.
Colour(Gardner) 顏色7Gardner max.
Composition(in%) Approx:
C12(Lauric)& LowerVariable
C14(Myristic)Variable
C16(Palmitic)Variable
C18(Stearic)Variable
C20(Arachidic)Variable
C18'(Oleic)Variable
Standard Packing: -- 25kgs net. in PP Woven with PE inner bag -- 600kgs net. in jumbo bag
Test Method:AOCS

硬脂酸（分餾三壓級）
STEARIC ACID
Specs No.:703-28605 Product Code:SA1840 Product Form:Beads

Property:
Acid Value 酸值200-212
Sapon Value 皂化值201-213
Iodine Value 碘值1.0max.
Titer(℃) 熔點55-57
Colour(5 1/4"Lovibond) 顏色Yellow 2.0max. Red 0.5max.
Composition(in%) Approx:
C12(Lauric)& Lower1max.
C14(Myristic)2max.
C16(Palmitic)60max.
C18(Stearic)40min.
C20(Arachidic)1max.
C18'(Oleic)1max.
Standard Packing: --25kgs net. in PP Woven with PE inner bag --600kgs net. in jumbo bag
Test Method:AOCS

硬脂酸（分餾三壓級）
STEARIC ACID
Specs No.:703-28606 Product Code:SA1850 Product Form:Beads

Property:
Acid Value 酸值198-210
Sapon Value 皂化值199-211
Iodine Value 碘值1.0max.
Titer(℃) 熔點55-58
Colour(5 1/4"Lovibond) 顏色Yellow 2.0max. Red 0.5max.
Composition(in%) Approx:
C12(Lauric)& Lower1max.
C14(Myristic)2max.
C16(Palmitic)53max.
C18(Stearic)47min.
C20(Arachidic)1max.
C18'(Oleic)1max.
Standard Packing: --25kgs net. in PP Woven with PE inner bag --600kgs net. in jumbo bag
Test Method:AOCS

硬脂酸（分餾三壓級）
STEARIC ACID
Specs No.:501-38608 Product Code:SAF1865 Product Form:Beads

Property:
Acid Value 酸值200-208
Sapon Value 皂化值201-209
Iodine Value 碘值1.0max.
Titer(℃) 熔點57-61
Colour(5 1/4"Lovibond) 顏色Yellow 3.0max. Red 0.5max.
Composition(in%) Approx:
C14(Myristic)0-1
C16(Palmitic)30-38
C18(Stearic)62-70
C18'(Oleic)0-1
Standard Packing: --20kgs multiply kraft paper bags --25kgs net. in PP Woven with PE inner bag --600kgs net. in jumbo bag
Test Method:AOCS

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