How did the Catholic Church assure that the FACE reflected in the graven images of Jesus is truly Jesus’ facial feature?

Catholics have acquired images of our Lord Jesus Christ specially sketched by the first Catholics since the first century between 100 – 400AD) which was found in the cave where they had kept it.

Aside from these paintings of the ancient Catholics, the Church also preserved the linen used to wrap the corpse of our Lord Jesus in 33AD, bearing His image.

While non-Catholics argue the authenticity of the Shroud backing it up with the passage found in the book of John, which states:

They took the body of Jesus and bound it with burial cloths along with the spices, according to the Jewish burial custom. (John 19:40)

Please note that the particular passage mentioned does not actually specify 2 pieces as the exact number of clothes – the stipulation based on the passage quoted was 

1). LINEN CLOTHES LYING THERE (pls. take note of its plural form which can be possible that it is more than one), and the 

2). separate cloth (a separate cloth aside from the first mentioned). Thus, it’s more likely that it’s more than 2 or 3 or even more.

Naturally, that could be more clothes which is COMMON SENSE because anyone could never clean Jesus’ body thoroughly from its excessive bloods by a single cloth alone, given the barbaric execution that He had gone through. Hence, it’s noticeable in John 19: 40 that it speaks of a plural form of clothes: They (Joseph of Arimathea & Nicodemus) took the body of Jesus and bound it with BURIAL CLOTHES along with the spices, according to the Jewish burial custom.  But this happened before the final wrapping of Jesus’ body.  Definitely, out of reverence, Joseph of Arimathea & Nicodemus would not use the same clothes they used on cleaning Jesus’s body after they removed it from the cross, in the burial rights. Logically, they would use another UNSTAINED CLOTH as in the Shroud which is a long strip of cloth, wrapped underneath the body, then over his head and down to His feet, which parallels with that of (Matthew 27:59)(Taking the body, Joseph wrapped it in clean linen (SINGULAR).

Therefore, non-Catholics’ contention with respect to the NUMBER OF CLOTHES is flawed.

Above all, although we believe that the Shroud is the actual burial cloth of the Lord, our faith is not centered on this piece of cloth as it’s not a matter of faith given that as it’s not Christ but simply the cloth used in His burial. It’s something that brings humanity back to Him.  Salvation is not in the Shroud, even if it truly draped the martyred body of Jesus, even if it was mysteriously given by God to His Church.  Salvation is that which is given to everybody by JESUS and not by the SHROUD.