Another day, and learning session.
This large stamp seemed reluctant to adhere to my acrylic square. I gave it a quick squirt with soapy water, dried it and it adhered. Unfortunately, the greetings part I had put on back to front so I was about to ink the back of it when I realised and switched it around:
Today, I used a small snowflake stamp and just my embossing ink (a glue type ink) and water marked the card:
This red card is far too thin to use as a card base but ideal for practising on.