You have to remember that each floor made from a natural wood requires a different type of stain to have adequate effects. You can see the samples of the stains we use and recommend in Wood floor staining tab.
One of the most important elements is to first choose the stain and apply it over a small surface of the wooden floor. Before the actual application of the stain you need to first remove all the old layers of the varnish or oil.
After applying the stain layer it is necessary to leave the stained floor to dry for a few hours, If you need more info on how to professionally stain each floor - please go to floor sanding Bristol tab. W highly recommend using Morrels Stains for parquets, engineered floor, hardwood floors and any other natural floors. They are drying fast and can be applied using hands, dips and also spray.