A Random sampling examination of Crayons in Denmark

Table 2B.
Screening of crayons by XRD and PLM

Sample No.

Colour

Conc. of filler (%w/w)

Main component of filler identified by
XRD and PLM

Mineral fibres obs. by PLM
(n liq.= 1.600)

Yes

No

911-1

911-2

911-3

Pine gr.

Turquoise

Blue

12.3

7.5

5.0

Quartz, TiO2, Talc.

Quartz, TiO2, Talc.

Talc, dolomite, quartz.

 

 

X

X

X

912-1

912-2

912-3

Yellow

Light blue

Deep gr.

31.7

23.5

29.8

Tremolite.

Tremolite, TiO2.

Tremolite.

 

 

X

X

X

913-1

913-2

913-3

Mint

Orange y.

Cyclamen

31.7

23.5

29.8

Tremolite,

Tremolite, calcite.

Tremolite, calcite.

 

X

X

X

914-1

914-2

914-3

Maize

Sky blue

Grey

17.3

18.1

19.1

Tremolite, hematite

Tremolite, TiO2.

Tremolite, TiO2.

 

X

X

X

915-1

915-2

915-3

Red

Orange y.

Light green

14.1

9.5

13.3

Tremolite.

Tremolite.

Tremolite, talc.

 

X

X

X

916-1

916-2

916-3

Green

Aquamarine

Grey

12.4

13.0

20.0

Tremolite, TiO2.

Tremolite, talc.

Tremolite, TiO2, ZnO.

 

 

X

X

X

917-1

917-2

917-3

Black

Violet

Deep blue

65.9

64.6

67,1

Muscovite, illite, quartz.

Muscovite, illite

Muscovite, illite

 

 

X

X

X

CYA-1

CYA-2

CYA-3

Red

Apricot

Violet

17.6

17.5

20.3

Tremolite, anthophyllite, quartz.

Tremolite, quartz

Tremolite.

X 1)

X 1)

 

X

CS-1

CS-2

CS-3

Cherry red

Yellow

Deep green

5.9

11.6

7.9

Calcite, quartz.

Calcite, quartz

Calcite, quartz

 

X

X

X

MO-1

MO-2

MO-3

White

Violet red

Green blue

12.6

20.6

16.2

TiO2, quartz, dolomite.

Calcite, dolomite, talc.

Calcite, talc

 

X 2)

X

X

KS-1

KS-2

KS-3

Blue

Red

Green

100

100

100

Gypsum

Gypsum

Gypsum

 

X

X

X

1) anthophyllite. 2) tremolite