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Potato Starch: Grated, Washed Through a Sieve and Settled
Grate potatoes, wash the pulp through a sieve, and the starch runs out with the water and settles as a white layer. Andrew Ure (1839) describes the works: rasping drums, hair sieves and three settling backs, with starch equal to 17–18 % of the potatoes. Work fast: Ure notes that the quicker it is made, the better the starch.
The picture: Huck's revolving sieve for separating starch from potato pulp, engraved in Les merveilles de l'industrie (1873).
Baguhan
A day with drying
Mga Tagubilin
1
1
Wash and grate
Wash and grate
Scrub the potatoes clean in water and grate them to a fine pulp, wetting the grater now and then so it does not clog.
Mga materyales para sa hakbang na ito:
Patatas5 kg
Tubig2 litroMga kailangang kasangkapan:
Timbangang panimbang
Kudkuran
Balde2
2
Wash the pulp through a sieve
Wash the pulp through a sieve
Set a fine sieve over a vat. Pour water over the pulp and knead it by hand until only fibre is left on the sieve. The water runs through milky with starch.
Mga materyales para sa hakbang na ito:
Tubig15 litroMga kailangang kasangkapan:
Pinong Bithay
Malaking batyang kahoy3
3
Settle three times
Settle three times
Let the milky water settle. Pour the liquor off into a second bucket, then a third; Ure: the finest starch collects in the last. Stir the white layers up in clean water and settle again until the water stands clear.
Mga materyales para sa hakbang na ito:
Tubig10 litroMga kailangang kasangkapan:
Malaking batyang kahoy
Balde4
4
Dry it
Dry it
Lift the wet starch out, spread it thin on muslin in a warm, airy place and let it dry. Crumble it to a powder and keep it in a jar. To keep it wet instead, store it under a little water and change the water often.
Mga kailangang kasangkapan:
Telang muslin
Garapong Salamin5
5
Potatoes to starch
Potatoes to starch
Naglo-load ng Jupyter notebook…
6
6
Limits
Limits
The method and yield are Ure's, from works with rasping drums; the hand grater, buckets and quantities are ours.
Mga Kinakailangang Kasangkapan
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