BS_5358-1993.pdf

BS5358:1993Committees responsible for thisBritish StandardThe preparation of this British Standard was entrusted by the Pigments,Paints and Varnishes Standards Policy Committee(PVC/-)to TechnicalCommittee PVC/28,upon which the following bodies were represented:British Cement AssociationBritish DecoratorsAssociationBritish Railways BoardConsumer Policy Committee of BSIDepartment of Education and ScienceDepartment of the Environment(Building Research Establishment)Department of the Environment(Property Services Agency)European Resin ManufacturersAssociationFurniture Industry Research AssociationMinistry of DefenceOil and Colour ChemistsAssociationPaint Research AssociationPaintmakersAssociation of Great Britain Ltd.Society of Chemical IndustryTitanium Pigment ManufacturersTechnical CommitteeA British Standard does not purport to include all the necessary provisions ofa contract.Users of British Standards are responsible for their correctapplication.Compliance with a British Standard does not ofitself confer immunityfrom legal obligations.This British Standard,havingSummary of pagesbeen prepared under thedirection of the Pigments,This document comprises a front cover,an inside front cover,pages i and ii,Paints and Varnishespages 1 to 8,an inside back cover and a back cover.Standards Policy Committee.was published under theThis standard has been updated(see copyright date)and may have hadauthority of the Standardsamendments incorporated.This will be indicated in the amendment table onBoard and comesthe inside front cover.into effect on15 January 19930BSI05-1999Amendments issued since publicationFirst published May 1976Second edition September 1986Amd.No.DateCommentsThird edition January 1993The following BSI referencesrelate to the work on thisstandard:Committee reference PVC/28Draft for comment 92/54595 DCISBN0580214613iiblankBS5358:19931 ScopeNOTE Either a)or b)may be specified.Both tests have been盈given to allow freedom in formulation.It is sufficient to meetThis British Standard specifies two types ofeither of the alternatives but not necessarily both.solvent-borne priming paints for application on5.3 Lead contentsoftwood for both interior and exterior usedoThe primer,when tested in accordance with(see warning note in foreword).BS 3900-B4.shall contain less than 0.5%(m/m)NOTE 1 Paints complying with the requirements of thisspecification may be suitable for use on some non-resinoustotal lead of the total mass of the primer as supplied.hardwoods,but the user is advised to consult the paintNOTE Current classification and labelling regulations requiremanufacturer in each individual circumstance.that paints containing more than 0.15 total lead should beNOTE 2 The titles of the publications referred to in thislabelled contains lead-should not be used on surfaces liable tostandard are listed on the inside back cover.be chewed or sucked by children.2 Definitions6 Flashpoint for type A products onlyFor the purposes of this British Standard,theThe primer,when tested in accordance withdefinitions given in BS 2015 and BS 6100-4 applyBS 3900-A8 or BS 3900-A13,shall have a flashpointhigher than 32 C.品3 Classification7 Condition in container and5The priming paints specified in this standard shallbe classified as follows.consistencya)Type A.A general purpose primer for7.1 Initial conditionapplication by brush and suitable for use onWhen the primer in its original container is女untreated wood or on wood pretreated with aexamined by the method described in BS 3900-A2.itpreservative.shall not show hard settling,excessive separation,岩NOTE Optimum exterior performance of the primer will beskinning,irreversible gelation,mould growth ornormally obtained if applied to wood pretreated with aputrefaction.preservative recommended in BS 5589.吉b)Type B.An industrial primer for factoryType A products shall be ready for use withoutthinning.品application by spraying,dipping or othermechanical process and which for exterior useType B products shall be supplied ready for use or inwill normally be applied to wood treated with onea form requiring thinning in accordance with theof the preservatives recommended in BS 5589.manufacturers recommendations.7.2 Keeping properties巴4 SampleThe primer,when stored in its original sealedunplFor the purposes of the tests referred to in clauses 5container at between 4C and 25C for 12 monthsto 15,a representative sample of the paint,from the date of manufacture,shall comply with themeasuring not less than 500 mL,shall be taken andrequirements of 7.1,clauses 8,9,10.1 and 15.packed by the method described in BS 3900-A1.NOTE If storage conditions are abnormal,the manufacturer ofthe primer should be informed so that any special5 Compositionrecommendations may be made.5.1 General8 Application propertiesThe primer shall be based on a pigmented8.1 Type A productsnon-aqueous solution or a dispersion of polymericmaterial.Neither the polymer nor the primer basedWhen the primer is applied in accordance withon it shall contain any added plasticizer.BS 3900-A5 to a plywood panel with moulding andexamined not less than 16 h after application,using5.2 Volatile content(type A products only)normal or corrected vision,the film shall be free8The volatile content of the primer shall not exceedfrom sagging,wrinkling or shearinessthe limiting values specified in either a)or b)as(see BS 2015).follows:8.2 Type B productsa)not more than 50%(m/m),when tested inWhen the primer is applied,by the method specifiedaccordance with BS 3900-B2 at a temperatureof1052C:by the manufacturer,to a panel as described in A.2and examined not less than 16 h after application,b)not more than 65%(V/V),when tested inusing normal or corrected vision,the film shall beaccordance with BS 3900-A10.free from sagging,wrinkling or sheariness(see BS 2015).oBSI05-1999