NTISthis.com

Evidence Guide: ICPSP233C - Manually prepare direct emulsion stencil

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

ICPSP233C - Manually prepare direct emulsion stencil

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare the work area and equipment

  1. Work area is made clean and functional prior to the commencement of work
  2. All equipment is inspected to ensure it is functional and where necessary, appropriate remedial action is taken prior to the commencement of work
  3. Appropriate coating trough is selected ensuring it is free of nicks and burrs
Work area is made clean and functional prior to the commencement of work

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

All equipment is inspected to ensure it is functional and where necessary, appropriate remedial action is taken prior to the commencement of work

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Appropriate coating trough is selected ensuring it is free of nicks and burrs

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare the screen

  1. Screen is selected according to job specifications
  2. Chemicals are applied and removed according to OHS requirements and manufacturer's/supplier's specifications
  3. Tension of screen mesh is checked for suitability according to job specifications
Screen is selected according to job specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Chemicals are applied and removed according to OHS requirements and manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Tension of screen mesh is checked for suitability according to job specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select emulsion

  1. Emulsion is selected according to requirements for ink type, print resolution, substrate, mesh type and machine type
  2. Emulsion is checked for expiry date and appropriate action taken
  3. Emulsion is prepared according to OHS requirements and manufacturer's/supplier's specifications
  4. Emulsion is applied and dried according to manufacturer's/supplier's specifications
Emulsion is selected according to requirements for ink type, print resolution, substrate, mesh type and machine type

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Emulsion is checked for expiry date and appropriate action taken

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Emulsion is prepared according to OHS requirements and manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Emulsion is applied and dried according to manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Process coated screen

  1. Image films are appropriately positioned onto prepared screen and positioned in cleaned/prepared/ appropriate exposure device
  2. Light source is positioned according to manufacturer's/supplier's specifications
  3. Exposure is calculated and stencil exposed according to manufacturer's/supplier's specifications
  4. Exposed screen is removed from vacuum frame exposure device
  5. Exposed screen is washed out after positive removal according to OHS requirements and manufacturer's/ supplier's specifications
  6. Processed stencil/screen is inspected for flaws and scum
Image films are appropriately positioned onto prepared screen and positioned in cleaned/prepared/ appropriate exposure device

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Light source is positioned according to manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Exposure is calculated and stencil exposed according to manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Exposed screen is removed from vacuum frame exposure device

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Exposed screen is washed out after positive removal according to OHS requirements and manufacturer's/ supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Processed stencil/screen is inspected for flaws and scum

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dry stencil

  1. Processed stencil is dried according to manufacturer's/supplier's specifications
  2. Backing sheet is carefully removed and stencil checked for full adhesion
Processed stencil is dried according to manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Backing sheet is carefully removed and stencil checked for full adhesion

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Block out screen

  1. Backing sheet is carefully removed and stencil checked for full adhesion
  2. Stencil is inspected for flaws, scum and/orientation
  3. Pinholes are spotted out with suitable filler and taped according to ink type and job specifications
Backing sheet is carefully removed and stencil checked for full adhesion

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Stencil is inspected for flaws, scum and/orientation

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Pinholes are spotted out with suitable filler and taped according to ink type and job specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Store screen

  1. Prepared screen is labelled according to enterprise specifications
  2. Prepared screen is stored in a clean, dry environment according to manufacturer's/supplier's specifications
Prepared screen is labelled according to enterprise specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepared screen is stored in a clean, dry environment according to manufacturer's/supplier's specifications

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Evidence of the following is essential:

correctly prepare direct emulsion stencils using manual techniques according to job specifications

demonstrate an ability to find and use information relevant to the task from a variety of information sources

prepare TWO different direct screens using manual coating and exposure techniques according to manufacturer's and job specifications, enterprise procedures and the listed Performance Criteria.

Context of and specific resources for assessment

Assessment must ensure:

assessment may take place on the job, off the job or a combination of these. Off the job assessment must be undertaken in a closely simulated workplace environment.

Method of assessment

A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate for this unit:

direct questioning combined with review of portfolios of evidence and third party workplace reports of on-the-job performance by the candidate.

Guidance information for assessment

Holistic assessment with other units relevant to the industry sector, workplace and job role is recommended.

Required Skills and Knowledge

Required skills

OHS in relation to operating machinery such as safely switching off machinery before cleaning is started

communication of ideas and information by labelling the completed screens

collecting, analysing and organising information by selecting correct emulsion according to job specifications

planning and organising activities by preparing the work area and equipment prior to coating the screens

teamwork when maintaining the production process in association with others

mathematical ideas and techniques by calculating required exposure time for the screen

problem-solving skills by inspecting stencil for flaws and spotting out pinholes

use of technology by processing the screen using photographic equipment

Required knowledge

preparation of screen for coating

significance of the mesh count

effect that screen tension has on emulsion coating

emulsion suitable for the job

preparation of work area and equipment

significance of good housekeeping

effect that the coating trough edge have on emulsion coating

selecting the right emulsions for the job

choice of emulsion

reasons for checking the expiry date of emulsions

maximum temperature at which the emulsion can be dried

coating and exposure techniques

need to have good vacuum pressure in the vacuum frame

why have you placed the light source in this position?

formula use to calculate exposure time

effects of overexposure and underexposure

optimum exposure time

effect on exposure that a white or coloured mesh have

how do you determine if the screen is washed out properly?

what characteristics determine a good or bad stencil?

drying screen and blocking out

drying the screen before blocking out

type of filler used for blocking out

reasons for spotting pinholes and taping the screen

storage and OHS

OHS requirements for UV exposure light

means by which this screen is able to be identified at a later date

manuals, safety and other documentation that are relevant to this task and where they are kept and information that is included in these documents

Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Coating techniques may include:

manual coating techniques for various emulsions, mesh types and definition requirements.

Type of stencil material may include:

direct stencil materials commonly used relative to each industry sector.

Enterprise procedures may include:

tasks must be performed according to enterprise procedures.

Degree of autonomy may include:

working under supervision to defined procedures to ensure production requirements are met.

Quality standards may include:

should meet client requirements and enterprise and industry standards.