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Hard Soap Boiled from Tallow and Soda Lye, Framed and Wire-Cut, Ure 1839
Malene Thyssen, simplified by HLHJ (Wikimedia Commons) · CC BY 2.5
Charlie

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Charlie

14. Oktubre 2026DE
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Hard Soap Boiled from Tallow and Soda Lye, Framed and Wire-Cut, Ure 1839

Hard soap is tallow boiled with caustic soda lye; potash would give soft soap. Andrew Ure (1839): run the lye through soda and quicklime, boil the tallow with weak lye, draw the spent lye off and boil again with stronger lye day by day, then ladle the soap into a frame and cut it with a brass wire into bars. Caustic lye burns skin and eyes: goggles and gloves. The picture: a bar of hard soap.
Katamtaman
A week

Mga Tagubilin

1

Run the lye

Fit a barrel with a perforated false bottom covered by cloth and a tap beneath, like Ure's vats. Put in a layer of quicklime, then alternate layers of ground soda ash and lime. Pour on water and draw off the clear caustic lye. Make some weak (hydrometer about 1.040) and some strong (up to 1.160).

Mga materyales para sa hakbang na ito:

Karbonatong Sodyo (abo ng soda)Karbonatong Sodyo (abo ng soda)2 kg

Mga kailangang kasangkapan:

Apog na hindi pa napapatayApog na hindi pa napapatay
Bariles na kahoyBariles na kahoy
Tela (Pansala)Tela (Pansala)
TubigTubig
HydrometerHydrometer
Timbang metalTimbang metal
Salamin Laban sa Tilamsik ng KemikalSalamin Laban sa Tilamsik ng Kemikal
Gwantes na gomaGwantes na goma
2

First boils

Melt the tallow in the cauldron, add weak lye and boil gently about 4 hours, stirring. Test on a knife blade: when the lye runs off the soapy paste at once, it has taken. Let it stand an hour and ladle off the spent lye beneath.

Mga materyales para sa hakbang na ito:

SeboSebo5 kg

Mga kailangang kasangkapan:

Malaking kalderong bakalMalaking kalderong bakal
PanggatongPanggatong
Sagwan na kahoySagwan na kahoy
Kutsilyo sa kusinaKutsilyo sa kusina
SandokSandok
Timbangang panimbangTimbangang panimbang
Salamin Laban sa Tilamsik ng KemikalSalamin Laban sa Tilamsik ng Kemikal
Gwantes na gomaGwantes na goma
3

Stronger lyes

Repeat with fresh lye, a little stronger each day, drawing the spent lye off each time, until the paste stays firm on cooling.

Mga kailangang kasangkapan:

Malaking kalderong bakalMalaking kalderong bakal
PanggatongPanggatong
Sagwan na kahoySagwan na kahoy
SandokSandok
HydrometerHydrometer
Salamin Laban sa Tilamsik ng KemikalSalamin Laban sa Tilamsik ng Kemikal
Gwantes na gomaGwantes na goma
4

Frame and cut

Skim the pan and ladle the soap into a wooden frame. After two days take the frame off, cut the block into slabs with a brass wire, then the slabs into bars, and stand them to harden.

Mga kailangang kasangkapan:

SandokSandok
Hulmahan ng sabonHulmahan ng sabon
Manipis na alambreng tanso-dilawManipis na alambreng tanso-dilaw
Kutsilyo sa kusinaKutsilyo sa kusina
Gwantes na gomaGwantes na goma
5

Soap from your tallow

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Mga Materyales

2

Mga Kinakailangang Kasangkapan

16

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