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11. 10月 2026

Blown Glass Jar with a Cork Lid

A jar is blown like a bottle, but instead of a narrow neck its mouth is opened out on the pontil to nearly the full width of the body, with straight walls and a flat base so it stands and can be filled with a spoon. A wide cork punched from bark makes the lid. All furnace work, the gather, the pontil and the annealing follow the bottle blueprint.

上級者

Half a day, plus annealing

手順

Gather, blow, pontil and anneal

The furnace, gathering, transfer to the pontil and annealing, step by step.

Blow a straight-sided bubble

Gather soda-lime glass, marver it into a cylinder and blow a bubble. Roll it on the marver to keep the walls straight and press the end flat on the marver for the base.

このステップの材料:

ソーダ石灰ガラス1 kg

必要な工具:

摂氏 1100 度に達しうるガラス溶融炉

ガラス吹き竿

マーバー（ガラスの転がし板）

ガラス吹き職人の作業台

耐熱手袋

保護めがね

Mark the shoulder

Score a line with the jacks where the mouth will be, just beyond the full width of the body.

必要な工具:

ガラス職人のジャックス

ガラス吹き職人の作業台

Transfer to the pontil

Attach the pontil to the base, crack the jar off the blowpipe at the scored line.

必要な工具:

ポンテ棒

ガラス吹き職人の作業台

Open the mouth

Reheat the open end and, turning the pontil on the bench rails, open it with the jacks until the mouth is as wide as the body. Fire-polish the rim smooth in the furnace.

必要な工具:

ガラス職人のジャックス

摂氏 1100 度に達しうるガラス溶融炉

ガラス吹き職人の作業台

Crack off and anneal

Crack the jar off the pontil straight into the annealing oven and anneal it as for the bottle.

必要な工具:

焼きなまし炉

耐熱手袋

Grind the pontil mark

When cold, grind the pontil scar on the base smooth on wet abrasive so it stands flat.

必要な工具:

紙やすり

砥石

Cut a cork lid

Measure the mouth's inside diameter. Punch a cork a little wider than it from thick, boiled cork bark with the cork borer, and taper its lower edge so it presses in.

このステップの材料: