SlovenščinaCatalogue of Slovene clays

sample40Njivice · Upper Carniola

46.267996 14.244788

Collected by Živa Slavec

Modern Collecting – Njivice · Upper Carniola
Modern Collecting
Photo Živa Slavec

Njivica

Njivica is a small settlement in the Besnica Valley. Here, the path splits in the direction of Nemilje on the slopes of Jelovica and in the direction under Jelovica towards the villages of Rovte, Češnjica and Podnart. A new road section, which uncovered layers of dark grey clay and slate, runs in this last direction.

Živa Slavec

Sample 40 is clay from Njivice (Upper Carniola). The recommended firing temperature is 900–1100 °C. The beginning of sintering is at 1100–1200 °C. At 1100 °C shrinkage is 4 % and porosity 6 %.

Clay samples

  1. Sample 40 – 800 °C800 °C
  2. Sample 40 – 900 °C900 °C
  3. Sample 40 – 1000 °C1000 °C
  4. Sample 40 – 1100 °C1100 °C
  5. Sample 40 – 1200 °C1200 °C
segrevanjeheating uppriporočena temp. žganjarecommended firing temperatureszačetek sintranjathe beginning of sinteringmehčanjesofteningžganje/firing °C%%00224466881010121214141616181820202222suha glina/dry clay900 °C1000 °C1100 °C1200 °C1300 °C
  • segrevanje
    heating up
  • priporočena temp. žganja
    recommended firing temperatures
  • začetek sintranja
    the beginning of sintering
  • mehčanje
    softening
%048121620suhadry9001000110012001300°C
poroznost/porosity %skrčki/shrinkage %

Clay preparation for testing

  1. unprocessed clayunprocessed clay
  2. sifted and dried claysifted and dried clay
  3. 012341.00.20.05%grain size in mm
  4. 1.5 % = 1.0 mm1.5 % = 1.0 mm
  5. 1 % = 0.2 mm1 % = 0.2 mm
  6. 0.3 % = 0.05 mm0.3 % = 0.05 mm