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Delabole Slate. Superior handcrafted Cornish slate products direct from the world renowned Delabole Slate Quarry in Cornwall.<br>
Roofing Slate - sized slate, randoms, peggies/scantle Worktops - kitchen, bathrooms, bar tops, countertops Slabs, Sills and Hearths - hearths, window sills, mantles, shelves, stair treads Flooring - traditional random, sawn & riven tiles Building Stone - blue/grey, sawn & natural face, rustic Landscape and Paving - rockery, hedging, feature stones, paving, chippings Memorials and Headstones - bespoke commemorative plaques House Signs - standard pet memorials & plaques Homeware and Clocks - table mats, pastry boards, chess boards Industrial Minerals - slate powders, slate granules
Slate Powders | Delabole Slate
SLATE POWDERS - Fineness Grading

Delabole Slate powders are produced in a wide range of sieve and sub-sieve fineness grades. The standard gradings and their typical particle size analyses are listed in Table 2. Fig. 3 illustrates the typical particle size analyses graphically. Photomicrographs of the coarsest and finest gradings are shown on the technical page in Figures 1 and 2 respectively, and to give an idea of scale the insets show a human hair to the same scale. These illustrations clearly show the wide fineness range of standard gradings which are maintained within narrow commercial limits.

 

PRODUCT RANGE

99-350, 99-300, 99-240, 99-200, 90-200, 85-200, 80-200, 75-200, 70-200.

 

APPLICATIONS (Powder)

Delabole Slate powder is used as a mineral filler, carrier, or surface dusting agent in the following products:

Bituminous Mixes

  • Asphaltic Floorings
  • Roofing Felts
  • Airfield Carpets
  • Bituminous Paints
  • Expansion Jointings
  • Damp-proof Courses
  • Pipe Protective Coatings
  • Mastics

Fertilizers

Filling Compounds

Insecticides

Paints & Printing Inks

Pigmented Powders

Plastics

  • Shellac based
  • Epoxy Resin based, and others

Sealing Compounds

Adhesives

Rubber

 

A Powder & Granules brochure is available which includes more detailed information. Please select "BROCHURES" from the menu at the top or click here.

 


FOR FURTHER INFORMATION, A PERSONAL QUOTATION OR TO PLACE AN ORDER, PLEASE CONTACT OUR SALES TEAM VIA EMAIL (sales@delaboleslate.co.uk), PHONE (01840 212242) or FAX (01840 212948)

 

Table 2: Particle size analysis of standard grades of Delabole Slate powder

Sieve Opening / Microns

B.S. 410 Sieve

PERCENT PASSING

‘F’ 20 Micron

99% - 350 B.S.S.

99% - 300 B.S.S.

99% - 240 B.S.S.

99% - 200 B.S.S.

95% - 200 B.S.S.

90% - 200 B.S.S.

85% - 200 B.S.S.

80% - 200 B.S.S.

75% - 200 B.S.S.

70% - 200 B.S.S.

422

36

 

 

 

 

 

 

 

 

 

 

99.6

353

44

 

 

 

 

 

 

 

 

 

 

99.0

295

52

 

 

 

 

 

 

 

 

 

 

98.0

251

60

 

 

 

 

 

 

 

 

99.9

99.9

97.0

211

72

 

 

 

 

 

 

99.9

99.7

99.5

98.5

94.0

178

85

 

 

 

 

 

 

99.7

99.0

98.0

95.0

90.0

152

100

 

 

 

 

 

99.9

99.5

98.5

95.0

92.0

87.0

124

120

 

 

 

 

99.9

99.5

99.0

96.0

91.0

87.0

81.0

104

150

 

 

 

99.9

99.5

98.5

97.0

92.0

88.0

83.0

78.0

89

170

 

 

 

99.7

99.3

97.0

94.0

89.0

84.0

79.0

74.0

76

200

 

 

99.9

99.5

99.0

95.0

90.0

85.0

80.0

75.0

70.0

64

240

 

99.9

99.7

99.0

97.0

92.0

86.0

81.0

76.5

72.0

67.0

53

300

99.9

99.5

99.0

97.0

94.0

88.0

82.0

77.0

72.0

67.0

62.0

44

350

99.0

99.0

98.0

95.0

90.0

83.0

77.0

72.3

68.0

63.0

58.0

20

 

97.0

85.0

80.0

73.0

67.0

62.0

58.0

54.0

51.0

47.0

42.0

10

 

88.0

57.0

53.0

49.0

46.0

43.0

40.0

38.0

35.0

32.0

28.0

5

 

68.0

26.0

26.0

24.0

23.0

21.5

20.0

19.0

18.0

17.0

15.0

2

 

36.0

6.0

5.5

5.2

4.7

4.3

4.2

4.0

3.7

3.6

3.0

Fig 3: Particle size analysis of standard grades of Delabole Slate powder

Note: Table below shows typical grading only; there may be some variations

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