La
gommalacca, oltre ad essere un'eccellente vernice ecologica, può
fornire un' ottimo stucco per legno (specialmente se le superfici
prevedono una lucidatura a tampone) e anche una buonissima cera.
Stucco di gommalacca
Per poter usare la gommalacca in qualità di stucco si procede nel seguente modo:
fai fondere le scaglie di gommalacca a "bagno-maria", verso la fine del processo puoi passare a fuoco diretto, poco intenso.
Stai attento, devi fondere la gommalacca, non bruciarla.
Se ti occorre uno stucco duro puoi aggiungere, quando la gommalacca è in fusione, resine tipo Danmar e Colofonia.
Per ottenere uno stucco plastico, invece, aggiungi un pò di cera.
Puoi colorare la gommalacca in fusione con polveri per ottenere uno stucco per legni dipinti.
Una volta che la massa è completamente fusa, non bruciata, la si cola:
- in appositi stampi a forma cilindrica o di sbarrette rettangolari;
-
su di un piano di marmo bagnato e con le mani, durante il
raffreddamento della massa, si formano le suddette sbarrette o
bastoncini cilindrici.
Una volta solidificato lo stucco è pronto all'uso o allo stipaggio.Per usarlo basta scaldare il bastoncino su una fiamma di candela, o accendino, e si lasciano cadere le gocce della gomma fusa nella zona da riempire, se le fessure da stuccare sono numerose o fonde ti conviene sciogliere lo stucco direttamente in un cucchiaino e, dal cucchiaio versarlo direttamente sul legno.
Nel frattempo devi scaldare un vecchio ferro da stiro della nonna - come quello in foto o anche a carbone-, non appena la gomma è penetrata nelle fessure stira la stuccatura per comprimerla meglio nei fori e per livellarla bene.Puoi usare anche un ferro elettrico da viaggio, ma devi stare molto più attento: mentre il "ferro antico" è più controllabile a livello termico, il ferro elettrico si scalda estremamente e quando spento si raffredda presto.
Se hai bisogno di una superficie a specchio finisci con carta abrasiva o con un pezzo di pomice a grana finissima ben lubrificate ad olio.
In genere, per i lavori di verniciatura a tampone, la stuccatura si esegue dopo il riempimento del poro con levigatura a pomice.
Cera di gommalacca
Puoi ottenere la cera di gommalacca microfiltrando (per tela) la stessa dopo lo scioglimento delle scaglie di resina lacca.
(preparazione della gommalacca)
Raccolta e fusa -fonde a 85-90°- la materia colata ha un aspetto bruno con odore di gommalacca e fornisce patine cerose brillanti e resistenti.
Può sostituire, in meglio, la cera carnauba in qualsiasi encausto.
The shellac, as well as being
an excellent eco-paint, providing a 'good stucco for wood (especially
if the surfaces must finish with polishing to pad) and also a very
good wax.
Stucco shellac
In order to use the shellac as a stucco, proceed as follows:
melt shellac flakes to "bain-marie", towards the end of the process can switch to direct fire, not very intense.
Be careful, you have to melt the shellac, not to burn.
If you need a hard putty can add, when the shellac is hot, resin type Danmar and Colofonia.
To obtain a more plastic stucco, however, add a bit of wax.
You can color the hot shellac with colored powders to obtain a stucco for painted wood.
Once the mass is completely melted, not burned, is poured:
- In special molds to form cylindrical rods or rectangular;
- On a wet marble flat and with hands, while cooling the mass, you must form these cylindrical rods or bars.
Once solidified the stucco is ready for use or storage.
To use it, simply heat the stick on a candle flame or lighter, and let's fall the drops of melted shellac into the area to be filled, if the cracks to be filled are many you'll want to dissolve the stucco directly into a spoon and pour it directly from spoon on the wood.
In the meantime you have to warm up an old iron - like the one in the photo- or to coal-fired, as soon as the shellac has penetrated into the slots to compress it better and to fill the holes and leveling well.
You can also use an electric iron for travel, but you have to be much more careful: while the "old iron" is more controllable to thermal level, the electric iron heats up very quickly and very quickly it cools off.
If you need a mirror finish, you must work with sandpaper or a piece of pumice fine-grained, well-lubricated with oil.
Generally, for works of polishing to pad, the filling of holes and imperfections is performed after filling the pores with levigation at pumice.
Shellac wax
You can get the shellac wax, by micro-filtering of the shellac after the dissolution of the scales of resin lacquer.
Stucco shellac
In order to use the shellac as a stucco, proceed as follows:
melt shellac flakes to "bain-marie", towards the end of the process can switch to direct fire, not very intense.
Be careful, you have to melt the shellac, not to burn.
If you need a hard putty can add, when the shellac is hot, resin type Danmar and Colofonia.
To obtain a more plastic stucco, however, add a bit of wax.
You can color the hot shellac with colored powders to obtain a stucco for painted wood.
Once the mass is completely melted, not burned, is poured:
- In special molds to form cylindrical rods or rectangular;
- On a wet marble flat and with hands, while cooling the mass, you must form these cylindrical rods or bars.
Once solidified the stucco is ready for use or storage.
To use it, simply heat the stick on a candle flame or lighter, and let's fall the drops of melted shellac into the area to be filled, if the cracks to be filled are many you'll want to dissolve the stucco directly into a spoon and pour it directly from spoon on the wood.
In the meantime you have to warm up an old iron - like the one in the photo- or to coal-fired, as soon as the shellac has penetrated into the slots to compress it better and to fill the holes and leveling well.
You can also use an electric iron for travel, but you have to be much more careful: while the "old iron" is more controllable to thermal level, the electric iron heats up very quickly and very quickly it cools off.
If you need a mirror finish, you must work with sandpaper or a piece of pumice fine-grained, well-lubricated with oil.
Generally, for works of polishing to pad, the filling of holes and imperfections is performed after filling the pores with levigation at pumice.
Shellac wax
You can get the shellac wax, by micro-filtering of the shellac after the dissolution of the scales of resin lacquer.
(Preparation of shellac)
Collecting and merged, melts at 85-90 ° , the casting material looks brown with a smell of shellac, and provides a bright and finishing waxy resistant.
Can replace, for the better, the carnauba wax in any encaustic.
Collecting and merged, melts at 85-90 ° , the casting material looks brown with a smell of shellac, and provides a bright and finishing waxy resistant.
Can replace, for the better, the carnauba wax in any encaustic.
