At Georgies: Plaster Slump & Hump Molds

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Serving 3-D & clay artists in the Pacific Northwest and beyond since 1965

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Slump & Hump Molds

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these molds:

Amaco Hump Molds
GR Wood Hump Molds
Plaster Plate Molds

Click here for Shelf Kits • Kiln Wash

Shimpo Hump Mold Throwing System

The hump mold throwing system works on any Shimpo wheel. Place the bat adapter on the wheelhead, place your choice of molds on the bat adapter, and you're ready to work. Hump molds make it quick and easy for production potters to turn out massive numbers of nearly identical pieces. You can spend more time on surface, glaze and design, and less on making the basic forms.

MHA • $52.00
Mold Bat Adapter
(Does not include bowl mold)

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HMB7.5 • $32.00
7.5" Bowl Hump Mold
(Bowl Hump Mold on the right)

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HMP7.5 • $32.00
7.5" Plate Hump Mold
(Plate Hump Mold upper left)

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HMP9 • $37.00
9" Plate Hump Mold
(Plate Hump Mold lower left)

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Hydro-Bat Hump & Slump Molds

So what exactly is a Hydro-Bat Hump Mold? The Hydro-Bat Hump Mold is a bat that you attach to your wheel-head to use while throwing. The mold attaches to the wheel with two rubber grommets embedded into the underside of the hydro-stone. After placing the hump mold on the wheel simply lay a slab on top of the hump mold. So think of it as throwing the backside of a form. You will still have to throw a foot by gathering clay from the slab or by attaching a coil and compressing it to the back. Hydro-Bat Hump molds allow beginners and professionals to consistently make forms with ease. We have a variety of forms and profiles within those forms. Just because these hump molds were designed to fit on the pottery wheel, doesn't mean you have to use them that way, they make great hand-building molds as well.

HB6

HB6 • $12.00
Hydro Bat 6"
The 6" mini Hydrobat is perfect for production of small cups and bowls. Light weight and easy to store away when not in use. Rubber grommets are spaced to fit perfectly on a 10" to 4" adapter. Made from hydrostone plaster to absorb moisture with extra strength to prevent chips and cracks. Use the "MHA" adapter above for this bat.

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HB8.5 • $15.50
Hydro Bat 8.5 "
The 8.5" Hydrobat is perfect for production of small cups and bowls. Light weight and easy to store away when not in use. Rubber grommets are spaced 6" apart allowing the Hydrobat to fit perfectly on a 10" to 6" adapter. Made from hydrostone plaster to absorb moisture with extra strength to prevent chips and cracks. Use the "MHA" adapter above for this bat.

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HB10 • $19.00
Hydro Bat 10"
The 10" Hydrobat is perfect for production of small cups and bowls. Light weight and easy to store away when not in use. Rubber grommets are spaced 6" apart allowing the Hydrobat to fit perfectly on a 10" to 6" adapter. Made from hydrostone plaster to absorb moisture with extra strength to prevent chips and cracks. Use the "MHA" adapter above for this bat.

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HB12.5 • $26.00
Hydro Bat 12.5"
The classic 12.5" Hydrobat is our most popular size by far. It fits a standard wheelhead with bat pins 10" apart. All Hydrobats are made from hydrostone plaster to absorb moisture like regular pottery plaster but with extra strength to prevent chips and cracks.

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HB14 • $29.50
Hydro Bat 14"
The 14" Hydrobat is the same circumference as a standard wheelhead. It fits on the wheel with bat pins 10" apart. Made of hydrostone plaster for extra strength but the same absorbtion properties as pottery plaster.

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HB16 • $39.00
Hydro Bat 16"
Made of Hydrostone plaster and more durable than regular plaster bats, plus casted with two rubber grommets that won't wear out and keep a tight grip over bat pins. Designed to absorb moisture to release your work without the use of a wire cutter. For Large Plates and Platters.

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HB18 • $51.00
Hydro Bat 18"
Made of Hydrostone plaster and more durable than regular plaster bats, plus casted with two rubber grommets that won't wear out and keep a tight grip over bat pins. Designed to absorb moisture to release your work without the use of a wire cutter. For Large Platters & Chargers.

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HB20 • $68.00
Hydro Bat 20"
Made of Hydrostone plaster and more durable than regular plaster bats, plus casted with two rubber grommets that won't wear out and keep a tight grip over bat pins. Designed to absorb moisture to release your work without the use of a wire cutter. For Chargers & very Large Platters

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HM8P • $38.00
8" Plate Hump Mold

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HM11P • $50.00
11.5" Plate Hump Mold

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HM12P • $52.50
12.5" Plate Hump Mold

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HM15P • $73.00
15" Plate Hump Mold

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HM12C • $59.00
12" Charger Hump Mold

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HM14C • $60.00
14" Charger Hump Mold

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HM15C • $74.00
15" Charger Hump Mold

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HM15PL • $97.50
10.5" Platter Hump Mold

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HM17PL • $101.00
14" Platter Hump Mold

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HSM1 • $44.00
12" Square Sushi Platter Slump Mold

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HSM2 • $44.00
8" x 22" Oval Dessert Tray Slump Mold

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HSM3 • $49.00
13" X 18" Oval Serving Tray Slump Mold

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HSM4 • $51.50
17" x 13" Lg Rectangle Tray Slump Mold

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HSM5 • $32.00
6" X 16" Butler Tray Slump Mold

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HSM6 • $51.50
Butler Tray Slump Mold
9" x 22"

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All white - image is for shape

HMB • $86.00 • Bowl Hump Mold
12.5" x 6" tall - round dome with flat bottom

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All white - image is for shape

HMB12 • $79.00 • Bowl Hump Mold
12.5" x 4" tall - shallow dome with flat bottom

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All white - image is for shape

HMB16.5 • $101.00 • Bowl Hump Mold
16.5" x 4" tall - wide, shallow dome with flat bottom

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HUMP55 • $11.00
5" x 5" x 1.5" Party Dish Hump Mold

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HUMP442 • $14.00
4" x 4" x 2" Sm Square Dish Hump Mold

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GR Pottery - Wood Hump Molds

GR Pottery Forms are wood drape molds in a variety of shapes and sizes that are ideal for making dinnerware and serving platters. They are cut and beveled fiberboard which make them durable and economical. No release agent or sealant needed.
Measurements are for the bottom edges. Top edge is about 1.5" less than the bottom dimensions.

GR5C • $9.75
Circle Hump Mold
5"

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Circle 6.5in Hump Mold

GR65C • $12.75
Circle Hump Mold
6.5"

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Circle 8in Hump Mold

GR8C • $13.50
Circle Hump Mold
8"

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Circle 9.5in Hump Mold

GR95C • $17.25
Circle Hump Mold
9.5 "

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Circle 11in Hump Mold

GR11C • $21.00
Circle Hump Mold
11"

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Circle 14in Hump Mold

GR14C • $25.00
Circle Hump Mold
14"

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Circle Hump Mold stack set of 5

GRCP • $65.50 (MSRP $74.25)
Circle Hump Mold -
stack set of 5
5", 6.5", 8", 9.5", 11"

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Circle Soft Edge 6.5in Hump Mold

GR65CS • $15.00
Circle Soft Edge Hump Mold
6.5"

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Circle Soft Edge 8in Hump Mold

GR8CS • $17.00
Circle Soft Edge Hump Mold
8"

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Circle Soft Edge 9.5in Hump Mold

GR95CS • $18.75
Circle Soft Edge Hump Mold
9.5"

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Circle Soft Edge 12.5in Hump Mold

GR125CS • $22.50
Circle Soft Edge Hump Mold
12.5"

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Circle Soft Edge Hump Mold set of 4

GRCP2 • $74.25
Circle Soft Edge Hump Mold - Set of 4
(2) 9.5" & (2) 12.5"

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Oval 4x8in Hump Mold

GR48O • $9.75
Short Oval Hump Mold
4" x 8"

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Oval 5x7in Hump Mold

GR57O • $12.00
Short Oval Hump Mold
5" x 7"

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Long Oval 5x10in Hump Mold

GR510O • $13.50
Long Oval Hump Mold
5" x 10"

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Long Oval 6x15in Hump Mold

GR615O • $17.25
Long Oval Hump Mold
6" x 15"

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Long Oval 7.5x16.5in Hump Mold

GR75165O • $22.50
Long Oval Hump Mold
7.5" x 16.5"

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Long Oval 8x15in Hump Mold

GR815O • $21.75
Long Oval Hump Mold
8" x 15"

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Long Oval 13x17in Hump Mold

GR1317O • $31.25
Long Oval Hump Mold
13" x 17"

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Oval Hump Mold stack set of 5

GROP • $74.25
Oval Hump Mold -
stack set of 5
5", 6.5", 8", 9.5", 11"

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Rounded Rectangle 4.5x13.5in Hump Mold

GR45135RR • $14.25
Rounded Rectangle Hump Mold
4.5" x 13.5"

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Rounded Rectangle 6x12in Hump Mold

GR612RR • $15.00
Rounded Rectangle Hump Mold
6" x 12"

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Rounded Rectangle 6x15in Hump Mold

GR615RR • $18.00
Rounded Rectangle Hump Mold
6" x 15 "

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Rounded Rectangle 7.5x16.5in Hump Mold

GR75165RR • $22.50
Rounded Rectangle Hump Mold
7.5" x 16.5 "

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Rounded Rectangle 10.5x15.5in Hump Mold

GR1015RR • $28.75
Rounded Rectangle Hump Mold
10.5" x 15.5 "

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Rounded Rectangle 12x17in Hump Mold

GR1217RR • $31.25
Rounded Rectangle Hump Mold
12" x 17 "

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Heart 6in Hump Mold

GR6HE • $16.25
Heart Hump Mold
6"

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Heart 8in Hump Mold

GR8HE • $18.75
Heart Hump Mold
8"

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Heart 10in Hump Mold

GR10HE • $21.25
Heart Hump Mold
10"

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Hexagon 6.5in Hump Mold

GR6H • $12.75
Hexagon Hump Mold
6.5" across

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Hexagon 8in Hump Mold

GR8H • $14.25
Hexagon Hump Mold
8" across

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Corner Triangle 8in Hump Mold

GR8CT • $12.75
Corner Triangle Hump Mold
8" across

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Square 3.5x3.5in Hump Mold

GR3535S • $8.25
Square Hump Mold
3.5" x 3.5"

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Square 5x5in Hump Mold

GR55S • $9.75
Square Hump Mold
5" x 5"

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Square 6.5x6.5in Hump Mold

GR6565S • $12.75
Square Hump Mold
6.5" x 6.5"

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Square 8x8in Hump Mold

GR88S • $13.50
Square Hump Mold
8" x 8"

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Square 9.5x9.5in Hump Mold

GR9595S • $17.25
Square Hump Mold
9.5" x 9.5"

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Square 11x11in Hump Mold

GR1111S • $21.00
Square Hump Mold
11" x 11"

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Short Rectangle 5x4in Hump Mold

GR54R • $9.75
Rectangle Hump Mold
5" x 4"

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Short Rectangle 5x8in Hump Mold

GR58R • $12.00
Rectangle Hump Mold
5" x 8"

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Short Rectangle 5x10in Hump Mold

GR510R • $15.00
Rectangle Hump Mold
5" x 10"

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Long Rectangle 4.5x12.5in Hump Mold

GR45125R • $13.50
Long Rectangle Hump Mold
4.5" x 12.5"

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Long Rectangle 6x14in Hump Mold

GR614R • $17.25
Long Rectangle Hump Mold
6" x 14"

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Long Rectangle 6.5x11.5in Hump Mold

GR65115R • $13.50
Long Rectangle Hump Mold
6.5" x 11.5"

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Long Rectangle 8x3.5in Hump Mold

GR835R • $9.75
Long Rectangle Hump Mold
8" x 3.5"

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Long Rectangle 8x13in Hump Mold

GR813R • $20.25
Long Rectangle Hump Mold
8" x 13"

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Spherical Rectangle 5x12in Hump Mold

GR512SR • $14.25
Spherical Rectangle Hump Mold
5" x 12"

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Spherical Rectangle 6.5x13.5in Hump Mold

GR65135SR • $18.00
Spherical Rectangle Hump Mold
6.5" x 13.5"

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Spherical Rectangle 8x15in Hump Mold

GR815SR • $22.50
Spherical Rectangle Hump Mold
8" x 15"

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Spherical Square 3.5x3.5in Hump Mold

GR3535SS • $8.75
Spherical Square Hump Mold
3.5" x 3.5"

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Spherical Square 5x5in Hump Mold

GR55SS • $8.75
Spherical Square Hump Mold
5" x 5"

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Spherical Square 6.5x6.5in Hump Mold

GR6565SS • $12.75
Spherical Square Hump Mold
6.5" x 6.5"

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Spherical Square 8x8in Hump Mold

GR88SS • $13.50
Spherical Square Hump Mold
8" x 8"

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Spherical Square 9.5x9.5in Hump Mold

GR9595SS • $12.25
Spherical Square Hump Mold
9.5" x 9.5"

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Spherical Square 11x11in Hump Mold

GR1111SS • $21.00
Spherical Square Hump Mold
11" x 11"

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Spherical Square Hump Mold - stack set of 5

GRSSP • $65.50 (MSRP $74.25)
Spherical Square Hump Mold - stack set of 5
5", 6.5", 8", 9.5", 11"

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Additional Helpful Items ...

GR Wheel Attachment w/Spacer, Pin & Bat

GRS • $3.75
1/2" Spacers for Forms
These 1/2" Spacers are perfect for placing under your form while the clay dries to a stiff, leather-hard state, plus helps keep the rims from warping.

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GR Wheel Attachment w/Spacer, Pin & Bat

WAWA • $56.25
Wheel Attachment set
with Spacer & Pin -
Bat included

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Bat for Slab Work

WAB • $18.75
Bat for Slab Work

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Spacer & Pin for Wheel Attachment

WAS • $6.25
Spacer & Pin for Wheel Attachment

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Wallie Circle Hump Mold 10

GR10WC • $25.00
Wallie Circle Hump Mold
10" Wallie means the Forms have a 90° walled edge with a 1" height for making straight edged pieces.

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Wallie Circle Hump Mold 10

GR12WC • $30.00
Wallie Circle Hump Mold
12" Wallie means the Forms have a 90° walled edge with a 1" height for making straight edged pieces.

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Wallie Spacer Pull

WSP • $8.75
Wallie Spacer Pull - 2.75"
Best to glue the pin (included) to both the Wallie Form and Spacer Pull with Elmer's or Wood Glue for easier removal of the Form from the clay.

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Studio Board

GRSB • $18.75
Studio Board
great work surface or use to flip
your work off the hump

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All contents related to Georgies' products copyright 2025. All rights reserved.
Georgies Ceramic & Clay Co. • 756 NE Lombard • Portland OR 97211
Phone: 503-283-1353 • Email: info@georgies.com
Store Hours: Monday-Friday 9:00a-5:00p Pacific time • CLOSED Saturday & Sunday

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