Studies and Research

Prof. Antonio Poletti

Chemical and biotechnological Consultant Via C. Belba, 7, 06100 Perugia Tel. 075/30971
Chemical analysis on a clay tablet, for cosmetic purpose, folded in a brown wrapper and packed in a cardboard case, on which there is written: “product made with WHITE CLAY, historically known as TERRA DI NOCERA UMBRA, delivered to the laboratory on 01/25/1985

CHEMICAL ANALYSIS

SiO2

TiO2

CO2

Al2O3

Fe2O3

FeO

MnO

MgO

CaO

Na2O

K2O

P2O5

H2O – ( 105 C )

H2O cristallizz.

26,46 %

0,25 %

24,83%

6,51 %

1,90 %

0,32 %

0,03 %

1,51 %

32,52 %

0,20 %

0,99 %

0,11 %

4,54 %

Assente

METAL ANALYSIS

Bario

Stronzio

Zirconio

Nichel

Cobalto

Vanadio

Cromo

Zinco

1146 mg/Kg

520 mg/Kg

140 mg/Kg

102 mg/Kg

< 1 mg/Kg

< 1 mg/Kg

< 1 mg/Kg

20 mg/Kg

The analytical data refer to the material as it is