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ریورس انجینئرنگ
سائنسز
کھیل
ٹیکنالوجی
پہننے والے آلات
Glaze Fit: Crazing, Shivering, and the Mismatch Behind Both
A glazed pot is two materials stuck together that shrink by different amounts as they cool. If the difference is small, the glaze ends up gently squeezed and the pot is stronger for it. If it is large, something has to give.
CRAZING is the glaze cracking into a network of fine lines, because the glaze shrank MORE than the body and is being stretched. SHIVERING is the glaze flaking off in slivers, because it shrank LESS and is being crushed. They are the same problem with opposite signs.
Crazing is often left deliberately, as a decorative crackle. Shivering never is: the flakes are glass, they come off in use, and on anything that holds food that is a genuine hazard rather than a flaw.
اعلیٰ
3 hours
ہدایات
1
1
Tell them apart, and know which way to move
Tell them apart, and know which way to move
CRAZING looks like a fine web of cracks across the glaze surface, often appearing days or weeks after firing as the body slowly takes up atmospheric moisture and expands. Run a finger over it and it is smooth; the cracks are in the glass, not the surface.
SHIVERING shows as sharp slivers lifting or flaking away, usually at edges, rims and handles where the glaze wraps a curve. It often appears with an audible ping as the kiln cools.
A crazed pot is not waterproof even if it looks it — liquid travels through the cracks into the porous body, which is why a crazed mug eventually smells. That is the practical reason to care beyond appearance.
اس مرحلے کے لیے مواد:
شفاف روغن1 ٹکڑا
ہڈی جتنے خشک مٹی کے برتن1 ٹکڑادرکار اوزار:
آوا2
2
The numbers behind the mismatch
The numbers behind the mismatch
Jupyter نوٹ بک لوڈ ہو رہی ہے…
اس مرحلے کے لیے مواد:
شفاف روغن1 ٹکڑا
برتنوں کا روغن1 ٹکڑادرکار اوزار:
ڈیسک ٹاپ کمپیوٹرآوا3
3
Thickness and edges, before any chemistry
Thickness and edges, before any chemistry
Before changing a recipe, check the application. Glaze that is too thick shivers at edges long before a well-fitted glaze would, because an edge has glaze on two faces meeting at a corner and nothing to hold it.
Wipe glaze thinner on rims, handles and any sharp arris. Rounding sharp edges slightly while the pot is leather-hard also helps a great deal, and costs one pass with a damp sponge.
Most reported glaze-fit faults turn out to be application faults. Chemistry is the answer when the fault persists on properly applied glaze across several firings — which is the change-one-thing-at-a-time rule saving a lot of wasted effort.
اس مرحلے کے لیے مواد:
شفاف روغن1 ٹکڑادرکار اوزار:
اسفنج
مٹی کے اوزاروں کا سیٹ
ڈیجیٹل ورنیئر کیلیپر ۶ انچ4
4
Keep test tiles, and label them
Keep test tiles, and label them
Fire test tiles of every glaze on every body you use, with one, two and three dips on the same tile, and keep them. A shelf of tiles answers questions that no amount of reading will.
Mark each tile with the glaze and body before firing — scratched into the clay, not written on with a pen that burns away. An unlabelled test tile is a pretty object of no use whatever.
Record the firing too: which kiln, what schedule, what cone it reached. A glaze is a result of a recipe AND a firing, and the same bucket in a different kiln is a different glaze.
اس مرحلے کے لیے مواد:
شفاف روغن1 ٹکڑا
کم درجہ حرارت پر پکنے والی مٹی1 کلوگرامدرکار اوزار:
مٹی کے اوزاروں کا سیٹآوامواد
4- 4 ٹکڑےپلیس ہولڈر
- 1 ٹکڑاپلیس ہولڈر
- 1 ٹکڑاپلیس ہولڈر
- 1 کلوگرامپلیس ہولڈر
متعلقہ بلیو پرنٹ
یہ بلیو پرنٹ علم بانٹتے ہیں — تکنیک، مواد یا اصول
Ash Glazing Pottery — The Accidental Discovery That Made Ceramics Waterproof
Clay کی طرف سے
دستکاری
67
0
0
0
0
0
The States of Clay: Five Conditions, and What Each One Will Let You Do
Clay کی طرف سے
سیرامکس اور مٹی
36
0
0
0
0
0
One Reading Is Not a Measurement: Repeat It, and Look at the Spread
Penny کی طرف سے
انجینئرنگ
52
0
0
0
0
0
CC0 پبلک ڈومین
یہ بلیو پرنٹ CC0 کے تحت جاری کیا گیا ہے۔ آپ اجازت لیے بغیر اس کام کو نقل، ترمیم، تقسیم اور کسی بھی مقصد کے لیے استعمال کرنے کے لیے آزاد ہیں۔
میکر کی حمایت کریں ان کے بلیو پرنٹ کے ذریعے پروڈکٹس خرید کر جہاں وہ میکر کمیشن وینڈرز کی طرف سے مقرر، کماتے ہیں، یا اس بلیو پرنٹ کی نئی تکرار بنائیں اور آمدنی شیئر کرنے کے لیے اسے اپنے بلیو پرنٹ میں کنکشن کے طور پر شامل کریں۔