Course detail

Laboratory Classes in Textiles and Sorbents

FCH-BCO_TAS_PAcad. year: 2011/2012

Application of substantive dyes on cellulosic fibres. Monitoring of dependence the electrolyte on dyeing of the cotton with direct dyes. Kinetics of dyeing and construction of "exhaustion" curves or rate-of dyeing curves. Dependence of fixing with cationactive tenside on colour differences and colour fastness. Colorimetric determination of the concentration of formaldehyde on the fibres with acetyl-acetone technique. Colour fastness on the water (grey scale). Textile printing with reactive dyes on the cotton. Printing of piments on natural fibres textiles. Printing of pigments on synthetic fibres and/or on the mixture of the fibres. Thermofix method. Transmission print and evaluation of the optimal choose of the substrates. The dependence of pH value on the stability reactive dyes on cellulosic fibres. Influence of thermal treatment on the degree of whiteness of the textiles. Fluorescent Brightening Agents. Evaluation of fabric creasing. Dyeing wool with acid dyes. Nonfelting treatment of wool. Transfer printing with pigments. Dyeing of cotton with natural dyes. Using of mordants and evaluation of hue.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Learning outcomes of the course unit

It can be assume that the students will have the basics for to work know-how in the industry at the end of this course.

Prerequisites

Colour perception, the knowledge of fluorescence brightening agents, knowledge of colour mixing and basic chemical calculations.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

100% participation in laboratory exercises. Writting and passing all practice papers.
Preparation for definite tasks in laboratory book.
Credit test.
Course-unit credit.

Course curriculum

1. Dyeing of cotton with using of saturn dyes, extraction curve in the presence of electrolyte or without electrolyte.
2. Colour fastness at dry or wet rubbing, control of hue compared with standard, sink in to woole, or cotton tissues.
3. Test for colour fastness to water.
4. Determination of content of formaldehyde concentration in coloured textilies.
5. Textile printing with using stencil, pigments printing, printing with using reactive dyes, transmission print. Hue control compared with standard.
6. Heat processing and evaluation on whiteness of textile.
7. Pressing of stuff and control angle of recover textile after press process.
8. Dyeing of woole with using of acids dyes, dependence of pH value of dye solution on resulting colour.
9. Adjustment of wool as against felting.

Work placements

Not applicable.

Aims

The aim of laboratory classes is investigation of some textile operation, as well as the interaction between substrate and active substance and at the condition of the operation.

Specification of controlled education, way of implementation and compensation for absences

Workbook control. Control of practice papers. Consultation. 11 laboratory exercises.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Basic literature

Prchal, V., Hodul, P.: Chemická technologie textilu I (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme BPCP_CHCHT Bachelor's

    branch BPCO_SCH , 3. year of study, summer semester, compulsory-optional

  • Programme BKCP_CHCHT Bachelor's

    branch BKCO_SCH , 3. year of study, summer semester, compulsory-optional

Type of course unit

 

Laboratory exercise

26 hours, optionally

Teacher / Lecturer