Test criteria The learner can:

Transcription

1 Title: Know how to produce specialist decorative finishes 2 Level: 2 Credit value: 3 Learning outcome The learner will: 1. know how to produce quality finish ground coats for painted decorative work 2. know how to produce broken colour effects using water-borne and solvent-borne scumbles Test criteria The learner can: 1.1 describe appropriate preparation processes, from the list below, to be used prior to the application of ground coats for decorative work: wet abrading, dry abrading, making good, spot priming 1.2 describe why the following defects may occur in the range of decorative work, if the ground coat finish is not of a high quality: uneven colour, ropiness, sinking, bittiness 1.3 describe how the application method may affect the quality of the finished work 1.4 explain the benefits of using a stipple brush or roller to provide the finish for some ground coats 1.5 state the appropriate coating types for use as ground coats for painted decorative work 2.1 state appropriate materials from the list below for producing the following broken colour effects materials: acrylic glaze, oil-based glaze, oil colourant, acrylic colourant, white spirit, linseed oil, driers, scumble, chamois leather, lint-free cloth, barrier cream broken colour effects: rag rolling, dragging, glaze and wipe, sponge stippling (additive and subtractive) 2.2 state the main ingredients in an oil-based glaze 2.3 state the difference between a glaze and a scumble 2.4 explain the following methods of extending and reducing the drying time of oil-based and acrylic scumbles: linseed oil, driers, glycerine, light spray, wet rag 2.5 explain the factors for the selection of materials as in 2.1 above for broken colour work: working time of material, yellowing, area size, number of operatives CC 2022K Page 1 of 5 Version 1 ( )

2 2.6 explain why it may be advantageous to prepare more than the calculated quantity of scumble for a piece of work 2.7 state how a uniform effect is produced when broad areas of broken colour are to be produced 2.8 describe the effect that incorrect viscosity of the scumble has on the appearance of the finished work 2.9 explain how the application faults listed below, which may result in an uneven pattern effect, may be prevented: loss of wet edge, banding/tracking, slip/skid marks 2.10 state the difference between opaque and translucent in relation to surface coatings 2.11 state why the following problems may result from the careless removal of masking material: damage to decorative effect, removal of ground coat 2.12 describe the cleaning and storage of the tools and equipment listed below, following use in oil-based scumble glaze: paint brushes, hair stipplers, mohair roller, lintfree rag, chamois leather, dragging brushes, palettes, kettles 3. know how to prepare stencil plates from given design and apply stencils 3.1 state the difference between positive and negative stencil types 3.2 describe the following methods of transferring a design onto the stencil plate materials of paper and proprietary stencil card: trace, pounce, photocopy 3.3 explain the use of the following materials for treating paper when manufacturing a stencil plate: linseed oil, shellac knotting 3.4 explain why the whole plate should be treated and the problems that a buckled or curled stencil plate can create 3.5 describe the suitability of the following base materials used for cutting stencil plates: glass plate, proprietary cutting mat 3.6 describe the following enlarging/reducing methods for stencil designs: accurate measurement, grid, illuminated projection, photocopy CC 2022K Page 2 of 5 Version 1 ( )

3 3.7 state the following planning considerations when setting out and applying stencils to wall areas: number of repeats/connections, location of doors, windows, corners, access requirements, room dimensions, stencil size, spacing, order of application 3.8 describe the purpose of chalk lines, centre/horizontal/vertical lines and registration marks to mark out an area to be stencilled 3.9 describe the reason for using each of the following securing methods: tape (masking, low tack), proprietary spray adhesive 3.10 describe how to prevent the following application faults: creep, smudging, paint lifting, uneven weight of colour over repeats, bittiness, undue texture 4. know how to produce wood and marble effects using basic techniques 4.1 state appropriate British Standard 4800 colours for the ground coats of the following wood effects: straight grain only oak, mahogany, one other timber type (e.g. pine, walnut) 4.2 outline the importance of ensuring that the appropriate colour is used 4.3 state the difference between scumble and varnish stain 4.4 state the ingredients used in oil-based scumbles for the following effects wood: straight grain only oak, mahogany, one other timber type (e.g. pine, walnut) marble: carrara 4.5 state the method by which oil-based glazes dry 4.6 state the ingredients of a water graining medium 4.7 state materials commonly used as binders in water graining 4.8 state materials which will prevent cissing when applying water colour 4.9 state the appropriate tools and brushes, from the list below, required to produce each effect as in 4.4 above and the materials from which they are made tools: metal/rubber/card combs, check/tick roller, natural sponges, feathers e.g. goose-wing CC 2022K Page 3 of 5 Version 1 ( )

4 brushes: rubbing in brushes, mixing brushes, fitches, floggers and dragging brushes, softeners (hog s hair, badger), sable pencils and writers, varnish brushes 4.10 outline the purpose of, and the effect produced by, tools and brushes as in 4.9 above 4.11 explain each of the following processes in relation to each wood and marble effect listed in 4.4 above 4.12 describe, the sequence of graining the following structural components: panelled doors, windows, dado rails, narrow linear runs (i.e. architraves and skirtings), small wall panels 4.13 describe the cleaning, maintenance and storage of tools and brushes as in 4.9 above 5. know how to produce basic textured finishes using brush and roller 5.1 state why the listed conditions make a surface suitable for the application of texture paint: clean, keyed, porous, nonporous, sealed 5.2 explain the selection and suitability of the following texture designs for ceilings and walls: stipple, bark, swirl 5.3 state the suitability of the following masking materials: masking paper, polythene sheets, drop sheets, self-adhesive masking paper, dust sheet (various types) 5.4 state the advantages and disadvantages of using a ready-mixed texture material 5.5 state what PPE should be used to reduce the risk from the following hazards involved with the mixing of powdered textured materials: inhalation, eye irritation, ingestion 5.6 explain the importance that consistency of material has in relation to texture designs as in 5.2 above 5.7 explain the purpose and the timing for the finishing processes of lacing and applying a margin 5.8 describe the effects of high temperatures and ventilation sufficiency when applying texture paint and on the wet texture finish CC 2022K Page 4 of 5 Version 1 ( )

5 Additional information about the unit: Unit purpose and aim(s) The aim of this unit is to provide the learner with the knowledge to: produce quality finish ground coats apply a range of broken colour effects. Unit expiry date 30 June 2015 Details of the relationship between the unit and relevant national occupational standards or other professional standards or curricula (if appropriate) Test requirements or guidance specified by a sector or regulatory body (if appropriate) Support for the unit from an SSC or other appropriate body (if appropriate) Location of the unit within the subject/sector classification system Name of the organisation submitting the unit Availability for use The knowledge developed by the learner will enable them to understand: the preparation and application methods for the decorative effects. This unit contributes towards the knowledge and understanding required for the following NOS units: VR 333 Apply paint systems by brush and roller VR 341 Produce broken colour work and basic stencilling VR 342 Produce and apply complex stencil designs Key skills This unit contributes towards the key skills in the following areas: Communication 1.2, 1.3 Problem solving 1.1, 1.2 To be tested in the academic and capability forum Endorsed by ConstructionSkills 05 Construction, Planning and the Built Env Building and Construction Construction Awards Alliance (CAA) Private/owned unit Unit available from 1 August 2008 Unit guided learning hours CC 2022K Page 5 of 5 Version 1 ( )