Paint-work that does the heavy lifting for 25 years

By and large Paint is what gives colour to the built environment.   And there are a few  things you  need  to know about  paint before  you  can  score  full marks with  your  fresh  coat  of paint you might  wish  to  deploy  on your new  house   or  on the existing  house   that  may  have  begun screaming for  the long overdue  makeover. First, painting  a  building demands  that   you must cover  areas  such windows  and  shutters  that  do not need to be  painted,    with  masking  tape. Depending on your budget , you may  also  need   a respirator  for  ease  of  breathing  because  oil  based paint has  strong  odours.  You  also  need  some  canvass  cloth  to   put underneath  the work  area  to  avoid  staining the floor  and  landscaping.Embed from Getty Images

Applying paint on the house interior or exterior can    be done using brush, roller or spray. Working with brush is slow but can reach tight areas like corners. The roller is ideal for flat   broad surfaces and is faster than using a brush. On  the  other  extreme   end , a spray is  faster  than a roller  but  consumes  a lot  of  paint.

Paint components

Paint  is  a blend  of seven components, namely  Binder ,Solvent, Base Extenders  ,Pigments ,Driers  and last  but not least  additives.The  binder  is  the  component  of paint that  solidifies  to  form the paint film. This is made from Linseed oils, Alkyd resins and vinyl and acrylic resins.

Solvent    are the liquid component of paints and can be water or organic like petroleum.Acrylic latex paint   is  water-borne and  is  considered  better  that  oil-borne  paints  because  it  does not emit strong  smell, does  not damage the environment , does  not  crack  easily, can  be  cleaned  using soap and water  only  instead  of  using  thinner  and  can  be  deployed  on any primer. On the  slip  side , oil  based  paints    are   good for  high  traffic  areas  like  wooden stairs, cast iron railings  and   are  known  to penetrate  deeply  on surfaces  such as  wood. Paint  thinners  is  also  as solvent and  is  used   to make   the paint more  fluid  for  ease  of  application.

The  base  material  for  most  paints  is  white  Titanium  dioxide which  make  the paint  hard  to  see through or opaque.

The  density of  paint  is  increased  using  Extenders  such as  silica, calcium carbonate  and china clay . Colour is added to   the paint using   pigments   which are as matter of fact   mixtures of organic and inorganic dyes. And dries  are  used  to  ensure  rapid  drying  of  paint when applied  on a  surface.Embed from Getty Images

In few words,  the important thing  to   note  is that ,Water-solvent  paints  are  great because   they  have low  odour ,brushes  can be  cleaned  in water  and  tolerate  damp  surfaces. However  they  are  no  good  for   cold   and  wet  external  surfaces  compared  with  oil  solvent paint  that  do  a great   service  under  such  conditions.

Paint System

This refer to how the paint is deployed on surfaces. Paints  systems  may  have  three  or  four    coats    and  each  perform  a  specific  function. A complete system requires a primer layer, under coat and finishing coat. In case of new external surfaces four coats are appropriate.

Primer

This  is the first  layer that is  applied on a   surface  and  must  hold  well on the  substrate  ,seal remaining    moisture  on the  surface to  prevent  mildew, offer  protection from  corrosion   and provide  good  smooth base  for the under coat. To  ensure  there is robust  adhesion , the  surface    must be cleaned  to  free  it  from loose   materials  like  dust  , mold , fungi, mildew and   rust.Embed from Getty Images

 

Under coat

Under coat  covers the  primer layer  and provide  a  good surface  for  a  finishing coat.Under coat paint  is made  from  alkyd   resins  or  acrylic emulsions.

Finishing coat

This  coat must be  durable  and  able  to  give  decorative  finish. The hard  gloss, eggshell  or  satin   finish paints  are  oil and  alkyd resin  based. On the  other  hand   water  solvent finishing paint    tend  to  be visually  softer  and  are  porous  to  moisture,  dry  quickly, emit little odour  and  do  not yellow  on ageing. Matt and silk finishes   are produce by   a vinyl and acrylic emulsion paints.

©Copy right 2017 eastafricaminihardware.com

Sources: 1.Material for Architects and builders by Arthur Lyons

2.  howstuffworks.com

 

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