|
Storage Problems
| Problems |
Possible Causes |
Preventive Measures |
| Sedimentation
and lumpish of the paint |
Prolonged storage
time. |
Avoid storage for too
long. Stir well before use. |
| Dried
paint film on top |
The lid is not closed
tightly or the paint is not fully filled that makes the
paint dry up. Storage under high temperature or near the
sun. |
Close the lid tightly
and ensure that there is as little air inside the tin as
possible. Store in a cool, dry place. |
| Clear
coatings become turbid |
Oil based coatings
mixed up with water. |
Close the lid tightly
to avoid moisture and water. |
| Thickening
or glutinous of the paint |
Volatilize of thinner
for oil based coatings due to loose sealing of the lid.
Storage temperature is too high or too low. |
Close the lid tightly
to avoid volatilization of thinner. Store under moderate
temperature. |
| Thickening
or glutinous of the hardener |
Moisture gets in the
hardener due to improper sealing of the lid. Prolonged
storage time. |
Close the lid tightly
after use, avoid exposure in the air for too long. Use
during validity period. |
Application Problems
| Mould
& Mildew |
| Remedy : |
Reduce 1part of Flower Mould Removal
Solution #413 with 1 part of water and apply with bristle
brush or spraying onto surfaces affected by mould and
mildew. Leave on for 16-24 hours followed by rinsing with
water. Let surface dry thoroughly before application of
paint. Scrap away loose paint and apply suitable paint
coat. |
| Possible Causes |
Preventive Measures |
| Have not remove all
traces of mildew before application of paint. |
Improve surface
preparation. Use Flower Mould Removal Solution #413 to
remove all traces of mildew from masonry or old paint
film. |
| Inappropriate paint
type with poor anti-mould property. |
Use paint with good
anti-mould property. |
|
|
| Flaking |
| Remedy : |
Scrape away loose and flaky paint film,
paint again according to the correct painting procedures. |
| Possible Causes |
Preventive Measures |
| The wall is not
completely dry. |
The wall must be cured
for over 4 weeks. |
| Application of paint
before the patching paste is hard dried. |
Patching paste must be
hard dry before putting of subsequent coats. |
| Have not removed all
the loose and flaky old paint film. |
Scrape away all the
loose and flaky paint film. |
| Surface to be painted
has remnants of wax, oil or water etc. |
Improve surface
preparation. |
| The surface to be
painted is smooth and slippery. |
Make the surface
coarse by sanding. |
|
|
| Chalking |
| Remedy : |
Wipe away chalking surface by a soft
cloth. Apply one coat of Flower Masonry Sealer #973 or
#975 and put on suitable emulsion paint. |
| Possible Causes |
Preventive Measures |
| High moisture content
of the wall or the patching paste. |
The wall must be cured
for 4 weeks or above, the patching paste must be
thoroughly dry. |
| High alkaline of the
wall or patching paste. |
The wall must be cured
for 4 weeks or above and remove alkaline chalk. |
| Reduce emulsion paint
with too much water. |
Reduce according to
correct reduction ratio. |
| Masonry sealer not
applied. |
Use Flower Masonry
Sealer #973 or #975 to reduce influence by the alkaline
of the wall to the top coat. |
| High absorption power
of the surface to be painted. |
Use Flower Masonry
Sealer #973 or #975 to reduce the absorption of emulsion
paint by the surface to be painted. |
| Chalking of the
patching paste. |
Apply the patching
paste according to its instruction and put on one coat of
Flower Masonry Sealer #973 or #975 before painting. |
|
|
| Small
Particles On Paint Film |
| Remedy : |
Sand down area with small particles,
clean with soft cloth that can pick up dust and paint
again. |
| Possible Causes |
Preventive Measures |
| Dusty/dirty
environment. |
Make sure the
environment is clean by sprinkling water to the floor and
improve ventilation. |
| Painting tools are
dirty. |
Ensure paint
containers, stirring devices, paint brushes and spray
guns are clean. |
| The paint is mixed up
with dry film of paint. Paint is not properly filtered
before use. |
Filter paint before
use. |
| Sediments of the paint
have not been stir well. |
Stir well before use. |
| Painting surface is
dirty. |
Blow away dust on the
painting surface and wipe clean with a soft cloth that
can pick up dust. |
|
|
| Blistering
(Bubbles appear on paint film) |
| Remedy : |
Sand down the blistering paint film
until smooth and paint again. |
| Possible Causes |
Preventive Measures |
| Surface to be painted
has remnants of water, oil or dust. |
Improve surface
preparation. |
| Rust is not completely removed from
metal surfaces. |
Remove all traces of rust from
metals. |
| High water content of wood. |
Wood must be thoroughly dry before
painting. |
| Painting when the wall is still
having a high moisture content. |
Wait until the wall is completely
dry. |
| Application of paint
when the patching paste, primer or first coat is still
wet. Even if the topcoat is dry, the base coats are still
wet. |
Do not apply coatings
when the underlying patching paste, primer or paint coats
are still wet. |
|
|
| Wrinkling |
| Remedy : |
Paint again after sanding. |
| Possible Causes |
Preventive Measures |
| The paint layer is
either too thin or too thick. |
The film thickness
should be over 20 microns but should not be too thick. |
| High viscosity of the
paint (paint is under reduced). |
Choose suitable
viscosity of paint. |
|
|
| Paint
film does not dry up properly |
| Remedy : |
Increase the temperature appropriately
or remove the wet paint film and paint again. |
| Possible Causes |
Preventive Measures |
| Surface to be painted
has remnants of oil, water, wax, alkaline etc. |
Improve surface
preparation. |
| Use of slow drying
thinner. |
Use coordinating
thinner. |
| Painting of subsequent
coat when the underlying coat is too thick or not
properly dried. |
Avoid too thick paint
coat. Do not put on subsequent coats if the underlying
coat is not thoroughly dry. |
| Low temperature, high
humidity, lack of ventilation. |
Improve ventilation,
paint under moderate temperature and low humidity
condition. |
| Incorrect mixing ratio
of two component coatings. |
Mix the paint with the
hardener according to the correct ratio. |
|
|
| Cracking |
| Remedy : |
Scrap away loose particles and old paint
film completely, paint again after reparation. |
| Possible Causes |
Preventive Measures |
| Crackling of wall or
patching paste. |
Choose good quality
patching paste with elasticity. |
| The paint is too
thick. |
Strictly control the
thickness of base and topcoats. |
| Apply topcoat before
the base coat is dry. |
Wait until the
underlying coats are thoroughly dry before putting on
subsequent coats. |
| Poor weathering and
cold check resistance of paint. |
Choose good weathering
and cold check resistance paint. |
|
|
| Fading |
| Remedy : |
Sand down the fading paint and paint
again. |
| Possible Causes |
Preventive Measures |
| High alkaline of the
wall. |
The wall must be cured
for over 4 weeks and scrape away the alkaline. |
| Poor weathering
resistance of paint. |
Choose coating with
excellent weathering resistance property. |
| Air pollution,
exposure to the sun, acid rain erosion. |
Choose coating with
excellent weathering resistance property. |
|
|
| Poor
Scrub Resistance (The paint film wears away easily due to
cleaning) |
| Possible Causes |
Preventive Measures |
Remedy |
| Choosing the wrong
type of paint. |
A high performance
paint is required for areas that need frequent cleaning.
Heavy duty paint is needed for high traffic areas. In
general a semi-gloss or gloss paint is more resistant to
scrubbing than matt finished paint. |
Scrape away old paint,
put on appropriate high performance paint. |
| Use of an abrasive
cleaning agent. |
Clean the painted
surface with the mildest detergent and least abrasive
material. |
Paint again if
necessary and avoid the use of abrasive cleaning agent. |
| The paint is not
thoroughly dry before cleaning. |
Allow enough dry time
so that the paint is hard dry and in its best
performance. Normally it takes a week for the paint to be
thoroughly dry and suitable for washing. |
Scrape away wearing
paint film and paint again. |
|
|
|
| Whiteness
of Paint Film |
| Remedy :
Sand down the paint film with whiteness and paint again. |
| Possible Causes |
Preventive Measures |
| High humidity,
relative humidity over 80%. |
Add appropriate amount
of Giraffe Standard Retarder #414. |
| Fast volatility of
thinner. |
Add appropriate amount
of Giraffe Standard Retarder #414. |
|
|
| Sagging
(The wet paint dripping down immediately after
application) |
| Remedy : |
Sand down the sagging part and paint
again. |
| Possible Causes |
Preventive Measures |
| During brush
application, apply too much paint on the paint brush. |
Do not dip too much
paint on the brush and do not apply too thick layer. |
| Choosing the wrong
type of paint brush. |
When the paint is more
diluted, use a soft brush; if the paint is more
condensed, use a short haired brush. |
| Application under low
temperature and high humidity environment, takes too long
for the paint to dry. |
Improve ventilation.
Apply under moderate temperature. Use fast drying paint
reducer. |
| Surface to be painted
has remnants of water, oil or wax due to inadequate
surface preparation. |
Improve surface
preparation. |
| Application of paint on previously
painted glossy and smooth surface. |
Make the glossy and smooth surface
coarse by the use of sand paper before application of
paint. |
|
|
| Poor
Colour/Sheen Uniformity |
| Remedy : |
Sand down a little and paint again |
| Possible Causes |
Preventive Measures |
| Application under high
temperature, high humidity or too cold weather. |
Add 3~5% Giraffe
Standard Retarder #414. |
| Poor reducing power of
thinner. |
Use combining thinner. |
| The surface to be
painted is coarse, sand paper is too coarse, not enough
sanding. |
Sand down thoroughly,
choose a suitable sand paper, sanding direction must be
the same. |
| Uneven thickness of
paint film. |
Ensure even thickness
during application. |
| Absorption of the
paint by the surface to be painted. |
Put on suitable primer
to reduce the absorption of the topcoat by the surface to
be painted. |
| Appearance of a denser
colour or increased gloss where wet and dry layers
overlap during paint application. |
Maintain a wet edge
when painting by applying paint from previously painted
wet area to dry area. If you want to stop painting for a
while, stop at natural break such as corner of the walls
to avoid uneven gloss effect. |
|
|
| Brush/Roller
Marks |
| Remedy : |
Paint again after sanding |
| Possible Causes |
Preventive Measures |
| Use of hard bristles
or rollers. |
Choose suitable
brushes or rollers. |
| Low temperature. |
Apply under
temperature of 10°C or above. |
| Fast drying of paint. |
Use combining thinner
or use slow drying thinner. |
|
|
| Poor
Print Resistance (The paint film takes on
the imprint of an object that is placed on it, e.g. books
on the painted shelf) |
| Possible Causes |
Preventive Measures |
Remedy |
| Use of low quality
semi-gloss or gloss latex paints that have poor print
resistance, especially under humid and warm conditions. |
Use high quality
semi-gloss or gloss latex paint. In general, acrylic
latex paints have better print resistance while fully
cured alkyd paints have excellent print resistance. |
Scrape away old paint
film and put on good quality paint. |
| Paint is not
thoroughly dry. |
Make sure the paint is
thoroughly dry before it is put into service. It takes
longer to dry under cold or humid condition. |
Sand down areas with
print marks and paint again. |
|
|
|
| Poor
Hiding |
| Remedy : |
Sand down a little and paint again. |
| Possible Causes |
Preventive Measures |
| Insufficient stirring,
the paint sediments have not been stir well. |
Stir well until there
is no more sediments of paint. |
| Low viscosity of the
paint (paint is over reduced). The paint layer is to
thin. |
Do not over reduce the
paint. Paint evenly, the paint film should not be too
thin. |
| Great contrast of the
underlying coat with topcoat, e.g. base coat is dark
while top coat is light. |
Reduce the contrast by
choosing more coordinating colours or apply a white coat
before topcoating. |
| Have not apply white
coat before the use of bright colours, aluminium,
fluorescent or pearlescent colours. |
First apply a white
coat before painting of bright colours, aluminium,
fluorescent or pearlescent colours. |
|
|
| Solvency
of topcoat to the underlying coat |
| Remedy : |
Sand down thoroughly and paint again |
| Possible Causes |
Preventive Measures |
| Solvency of primer to
the surface to be painted. |
Choose coordinating
primer to the surface to be painted. |
| Solvency of primer to
the patching paste. |
Choose coordinating
patching paste to the primer. |
| Application of paint before
underlying coat is dry. |
Wait until the underlying coat is
completely dry before applying subsequent coats. |
| Solvency of topcoat to the base
coat. |
Use coordinating primer and
topcoat. |
| |
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