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Graphite Powder Ground from Plumbago
Mary

Yenziwe ngu-

Mary

14. uMfumfu 2026FI
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Graphite Powder Ground from Plumbago

Plumbago, the black lead of Borrowdale, is natural graphite: soft, lead-grey and greasy, it cuts with a knife and blackens the fingers. Andrew Ure (1839) lists its uses against friction, for crucibles and for glossing cast iron. Pick it clean of rock, grind it and sift it to a fine powder. Wear a dust mask. The picture: a lump of natural graphite.
Oqalayo
Two hours

Imiyalelo

1

Dress the lumps

Break the plumbago with a hammer and pick out the pieces of rock, as the Borrowdale miners sorted and dressed it by hand.

Izinto zokwakha zalesi sinyathelo:

I-graphite yemveloI-graphite yemvelo1 kg

Amathuluzi adingekayo:

Isando esinekhanda eliyindilingaIsando esinekhanda eliyindilinga
Amagilavu erabhaAmagilavu erabha
Isikali sesilinganisoIsikali sesilinganiso
2

Grind and sift

Grind the clean pieces in the mortar a handful at a time and shake them through the sieves, finest last. Grind what stays on the sieves again.

Amathuluzi adingekayo:

Isigqulo NomgquloIsigqulo Nomgqulo
Isethi yezisefo (izimbobo ezilandelanayo)Isethi yezisefo (izimbobo ezilandelanayo)
Imaski YothuliImaski Yothuli
Amagilavu erabhaAmagilavu erabha
3

Store

Weigh the fine powder and keep it in a closed jar.

Amathuluzi adingekayo:

Isikali sesilinganisoIsikali sesilinganiso
Ijeke LengilaziIjeke Lengilazi
4

Powder from your plumbago

Ilayisha incwadi ye-Jupyter…

Izinto

1

Amathuluzi Adingekayo

7

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