Decorative surface covering, in particular floor or wall covering, obtained from processing a phthalate-free PVC-based plastisol composition for the production of decorative surface coverings, said surface covering having a TVOC (total volatile organic compound) emission lower than 100 μg.m-3, preferably a VOC (volatile organic compound) emission, lower than 10 μg.m-3, measured after 28 days according to a test method based on ISO 16000-6, ISO 16000-9 or ISO 16000-10, wherein the VOC emission is equal to the sum of the TVOC (total volatile organic compound) emission, the SVOC (semi-volatile organic compound) emission and the formaldehyde emission, wherein said composition comprises from 10 to 200 parts, preferably from 20 to 150 parts per 100 parts of polyvinyl chloride of a plasticizer blend comprising the following parts per weight ingredients: - from 5 to 190 parts, preferably from 10 to 160 parts, more preferably from 15 to 130 parts, most preferably from 15 to 75 parts of one or more phthalate-free primary plasticizers characterized by a solution temperature at the clear point, comprised between 130 and 200°C, preferably 130 and 160°C, and a vapor pressure at 25°C of less than 5. 10 -3 mm Hg, the one or more phthalate-free primary plasticizers being selected from the group consisting of the alkyl esters of cyclohexane dicarboxylic acids and the alkyl esters of aromatic di-, tri-, or tetra-carboxylic acids, with the exception of orthophthalic acid; - from 1 to 100 parts, preferably from 3 to 80 parts, more preferably from 5 to 60 parts, most preferably from 5 to 50 parts of one or more phthalate-free secondary plasticizers characterized by a solution temperature at the clear point, of less than 130°C, preferably comprised between 70 and 129°C, and a vapor pressure at 25°C of less than 10 -1 mm Hg; the solution temperatures of the one or more primary and the secondary plasticizers being measured according to DIN 53408 on suspension PVC with a K-value of 71; the vapor pressure of the one or more primary and the secondary plasticizers being measured according to ASTM E1194-07; wherein the ratio of the content of said one or more phthalate-free primary plasticizers to the content of said one or more phthalate-free secondary plasticizers is comprised between 0.1 and 10, preferably between 0.5 and 7.5, whereby the gelation temperature exhibited by said plastisol in the presence of said one or more primary plasticizers alone is reduced by at least 5°C. - from 5 to 190 parts, preferably from 10 to 160 parts, more preferably from 15 to 130 parts, most preferably from 15 to 75 parts of one or more phthalate-free primary plasticizers characterized by a solution temperature at the clear point, comprised between 130 and 200°C, preferably 130 and 160°C, and a vapor pressure at 25°C of less than 5. 10 -3 mm Hg, the one or more phthalate-free primary plasticizers being selected from the group consisting of the alkyl esters of cyclohexane dicarboxylic acids and the alkyl esters of aromatic di-, tri-, or tetra-carboxylic acids, with the exception of orthophthalic acid; - from 1 to 100 parts, preferably from 3 to 80 parts, more preferably from 5 to 60 parts, most preferably from 5 to 50 parts of one or more phthalate-free secondary plasticizers characterized by a solution temperature at the clear point, of less than 130°C, preferably comprised between 70 and 129°C, and a vapor pressure at 25°C of less than 10 -1 mm Hg; the solution temperatures of the one or more primary and the secondary plasticizers being measured according to DIN 53408 on suspension PVC with a K-value of 71; the vapor pressure of the one or more primary and the secondary plasticizers being measured according to ASTM E1194-07; wherein the ratio of the content of said one or more phthalate-free primary plasticizers to the content of said one or more phthalate-free secondary plasticizers is comprised between 0.1 and 10, preferably between 0.5 and 7.5, whereby the gelation temperature exhibited by said plastisol in the presence of said one or more primary plasticizers alone is reduced by at least 5°C. the solution temperatures of the one or more primary and the secondary plasticizers being measured according to DIN 53408 on suspension PVC with a K-value of 71; the vapor pressure of the one or more primary and the secondary plasticizers being measured according to ASTM E1194-07; wherein the ratio of the content of said one or more phthalate-free primary plasticizers to the content of said one or more phthalate-free secondary plasticizers is comprised between 0.1 and 10, preferably between 0.5 and 7.5, whereby the gelation temperature exhibited by said plastisol in the presence of said one or more primary plasticizers alone is reduced by at least 5°C.