June 2008

Currently Browsing Archives For 'June 2008'

methods: processing

by George MacLeod on Jun 3rd in methods

The processing of polyester crystic resin impregnated soil samples into soil thin section slides is effectively a 5 stage process, bonding to a slide, cutting off excess, grinding to desired thickness, polishing and finally coverslipping. Bonding soil block to slide : The impregnated soil block is cut with an abrasive cutter (Buehler Petrocut) into approximately […]

methods: impregnation

by George MacLeod on Jun 3rd in methods

The choice of resin for impregnation is mainly governed by the the intended use of the thin section slide. In the case of soil thin section production the most widely used resin is polyester (Polylite 32032-00). This resin has a number of advantages, and some disadvantages. Polylite is relatively cheap, can easily be thinned with […]

methods: drying

by George MacLeod on Jun 3rd in methods

When using either epoxy or polyester resins in the production of soil thin sections it is essential to remove as much water from the soil to allow the hydrophobic resin to fill all the pore spaces effectively. This can be done either by air or oven drying or by replacing the water with another liquid […]

methods: sampling

by George MacLeod on Jun 3rd in methods

The main aim of sampling is to obtain soil samples in as undisturbed a state as possible. The process involves the careful use of Kubiena tins inserted into soil profiles, removed, sealed and bagged for transport to the lab. back in the lab samples are normally dried because for most purposes the resins used for […]

Powered By Wordpress Designed By Ridgey