Stoneware Dinner

What is the oily stuff coming out of my Pfaltzgraff stoneware?

I noticed some of my new stoneware dinner plates were not drying properly in the dishwasher and out of curiosity placed them in a hot oven for a few minutes. To my surprise, they were 'sweating' an oily liquid and after a few more minutes they looked as if you burned cheese in them. Very weird. I noticed that some fine dark veins on the glaze, disappeared after this heat treatment.. The liquid being sweated out was coming out through these veins. After putting them through dishwasher again, they noy come out clean and dry. What could it be?

It sounds a bit like some of the homemade pottery my daughter brings home from college before its been washed. I wonder if it was properly baked in the kiln. I would try washing them by hand with hot, soapy water and something rough, like a scotch brite. If they still are "sweating", not water proof, or imparts a funny taste on the food, it I would take them back to the store.

It sounds like they may be porous and thats not good if you going to eat off them on a daily basis. Are you sure these were meant to be used as dinner plates and aren't meant to be decorative? (i.e., plate liners or just to look at).

If you decide to keep them, you may want to check for lead. Its a long shot but lead poisoning is nasty stuff.

Find Stoneware Dinner On eBay Below:

Liddy Tuscan Garden Fine China Dinner Plate 1 GC
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Meiwa Art 2000 SNOWFLAKE White Blue 11 Dinner Plate Good Condition
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Hearth Hand Magnolia SOLD OUT Cream White Stoneware Dinner Plate NWT Easter Mult
Hearth Hand Magnolia SOLD OUT Cream White Stoneware Dinner Plate NWT Easter Mult
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MONTROSE STONEWARE 1982 NICOLE 9441 DINNER PLATE 10 1 2 BLUE FLORAL
MONTROSE STONEWARE 1982 NICOLE 9441 DINNER PLATE 10 1 2 BLUE FLORAL
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BRISTOL STONEWARE JAPAN BLUE ASTER S 7094 DINNER PLATE 10 3 4 PL
BRISTOL STONEWARE JAPAN BLUE ASTER S 7094 DINNER PLATE 10 3 4 PL
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Louisville Stoneware Dinner Plate Beige and Blue With Orange Tiger
Louisville Stoneware Dinner Plate Beige and Blue With Orange Tiger
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DENBY STONEWARE ENGLAND NATURAL PEARL NWT DINNER PLATES HTF DISCONTINUED PATTERN
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DENBY MIST STONEWARE NEW WITH TAG DINNER PLATES DISCONTINUED PATTERN HTF NEW
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HOME  GARDEN PARTY NORTHWOODS PINECONE DINNER PLATE SPONGE STONEWARE
HOME GARDEN PARTY NORTHWOODS PINECONE DINNER PLATE SPONGE STONEWARE
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8 9 1 4 DINNER PLATES STERLING IRONSTONE BROWN BLACK LEAF GEOMETRIC PATTERN
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Kingsbury Stoneware Autumn Floral Hand Painted 10 3 4 Dinner Plate
Kingsbury Stoneware Autumn Floral Hand Painted 10 3 4 Dinner Plate
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Vintage English Ironstone England Provence Red Set 4 Dinner Plates 10 VGC
Vintage English Ironstone England Provence Red Set 4 Dinner Plates 10 VGC
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Pfaltzgraff Naturewood Set of 4 Oversized Dinner Plates
Pfaltzgraff Naturewood Set of 4 Oversized Dinner Plates
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Camelot STONEWARE Spring Meadow 11 Dinner Plate Yellow Green Flowers Japan
Camelot STONEWARE Spring Meadow 11 Dinner Plate Yellow Green Flowers Japan
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1 Of 12 Langley Denby Sherwood Stoneware Hand Painted Dinner Plates England
1 Of 12 Langley Denby Sherwood Stoneware Hand Painted Dinner Plates England
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4 Home and Garden Party FLORAL 1025 Dinner Plates
4 Home and Garden Party FLORAL 1025 Dinner Plates
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William  Sonoma Wine Claret Dinner Plate 11 G3
William Sonoma Wine Claret Dinner Plate 11 G3
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Pier 1 SAKUI Square Set of 3 Dinner Plates Off White 11
Pier 1 SAKUI Square Set of 3 Dinner Plates Off White 11
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Vintage Mikasa Stoneware Dinner Plate Set of 4 Flowers Garden Party Basket 9053
Vintage Mikasa Stoneware Dinner Plate Set of 4 Flowers Garden Party Basket 9053
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IRON MOUNTAIN ROAN MOUNTAIN DINNER PLATE 11 1011H
IRON MOUNTAIN ROAN MOUNTAIN DINNER PLATE 11 1011H
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Studio Tord Boontje Target 2006 GOLD Set of 4 Dinner Plates 11 Reindeer A
Studio Tord Boontje Target 2006 GOLD Set of 4 Dinner Plates 11 Reindeer A
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Studio Tord Boontje Target 2006 GOLD Set of 4 Dinner Plates 11 Reindeer B
Studio Tord Boontje Target 2006 GOLD Set of 4 Dinner Plates 11 Reindeer B
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Studio Tord Boontje Target 2006 GOLD Set of 4 Dinner Plates 11 Reindeer C
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Furio Tartan Plaid Red Green Christmas 10 3 4  Dinner Plates
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MIKASA STONECRAFT ARTISAN STONEWARE KA103 SPRING FLORALS DINNER PLATE NITA 1970s
MIKASA STONECRAFT ARTISAN STONEWARE KA103 SPRING FLORALS DINNER PLATE NITA 1970s
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Temp tations by Tara POLKA DOT RED Set of 4 Dinner Plates 10 1 2
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Lot of 4 Mountain Wood Stoneware Dinner Plates Dried Flowers Pattern 1970s MCM
Lot of 4 Mountain Wood Stoneware Dinner Plates Dried Flowers Pattern 1970s MCM
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Mikasa Whole Wheat Autumn Song Dinner Plate 10 3 4
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Charmcraft Stoneware Dinner Plates Simplicity Oven to Table Japan
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HARVEST Stoneware 10 5 8 Dinner PLate Hand Painted GoldBrown Fruit
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Stoneage Cinnamon by Gourmet Expressions DINNER PLATE 11 1 4 Rust Brown Edge
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Vintage Retro Casual Ceram Electra ATHENA 8012 Stoneware Dinner Plate MCM
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4 Tienshan Stoneware Raspberry Social Dinner Plates w Berries Leaves Flowers
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SET 4 GIBSON BAHAMA DINNER PLATES PALM TREE 10 1 2
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Tabletops MISTO LIGHT TAUPE SQUARE Set of 6 Dinner Plates 10 1 2
Tabletops MISTO LIGHT TAUPE SQUARE Set of 6 Dinner Plates 10 1 2
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